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Increase 512MB Upload Limit for All-in-One WP Migration Plugin

Leron Amin 403 Comments

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In this tutorial you will learn how to quickly unlock the All-in-One WP Migration plugin extension for free, which will remove the 512 MB upload limit and increase it to unlimited.

Using the WordPress Migration plugin is a great time saver when transferring your WordPress website between hosting providers.

Before getting started with this tutorial, you should have already installed WordPress on a web hosting provider such a Google Cloud, SiteGround, Bluehost, or Amazon AWS.

To get started, follow along with the video above. If you get stuck, check below to see the steps listed individually with images.

IMPORTANT UPDATE (09/23/2020)
For the instructions outlined in this tutorial to work, you must use version 6.77 or earlier of the All-in-one WP Migration Plugin. You can skip the steps in this tutorial and simply download the unlimited version of 6.77 here.

There are 7 steps in this tutorial:

1. Activate Plugin

all-in-one wp migration unlimited extension free
Make sure that your All-in-One WP Migration plugin is activated.

2. Open Plugin Editor

all-in-one wp migration unlimited extension free
From your WordPress sidebar menu, click on Editor under the Plugins column.

3. Select Plugin

all-in-one wp migration unlimited extension free
In the upper right-hand corner of the Editor page, select the All-in-One WP Migration plugin.

4. Open constants.php File

all-in-one wp migration unlimited extension free
After selecting the All-in-One WP Migration plugin, select constants.php from the list of plugin files.

5. Edit constants.php File

all-in-one wp migration unlimited extension free
Scroll down to line 249 of the constants.php file to the Max File Size section, and add * 20 next to the existing number as shown below:

  // =================
  
// = Max File Size =
  
// =================
  
define( 'AI1WM_MAX_FILE_SIZE', 536870912 * 20 );

6. Save Changes

all-in-one wp migration unlimited extension free
Scroll to the bottom of the page and click on Update File in order to save changes.

7. Test Settings

all-in-one wp migration unlimited extension free
If your changes were successful, you will notice that the maximum upload filesize has been increased to 10GB.

8. Optional Increases

If you ever need to increase the upload limit to more than 10GB, simply increase the multiplier. By using a multiplier of 60 instead of 20 (as shown below) you would increase your upload limit to 30GB. 


  // =================
  
// = Max File Size =
  
// =================
  
define( 'AI1WM_MAX_FILE_SIZE', 536870912 * 60 );

Be aware that the upload limit will revert back to 512MB whenever the plugin is updated, so you will need to repeat this tutorial if you ever update the plugin.

Advanced Users

If you prefer to edit the file from outside of WordPress, you can find the plugin’s contants.php file by using the following file path:

/wp-content/plugins/all-in-one-wp-migration/constants.php

For Google Cloud, AWS, and Azure users – use the file paths below to locate your constants.php file.

If you’re using WordPress Bitnami, your constants.php file will be located at:

/opt/bitnami/wordpress/wp-content/plugins/all-in-one-wp-migration/constants.php

If you’re using WordPress Click-to-Deploy, your constants.php file is located at:

/opt/bitnami/wordpress/wp-content/plugins/all-in-one-wp-migration/constants.php

That’s it!

If you have any questions or comments about this tutorial, be sure to post them below!

Thanks,

signature

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Comments

  1. Edenilson says

    Hey friend,
    Congratulations! This function worked perfectly. But it only allows a larger size of files to upload, it still doesn’t allow exporting to Dropbox or Mega.

    Does the friend know how to tell us how to enable All-in-One WP Migration to export to Dropbox or Mega?

    Thanks.

    Reply

    • Leron Amin says

      Hi Edenilson,

      This tutorial is only to increase the upload limit, and doesn’t unlock the additional ‘export to’ options.

      Let me know if you have other questions,
      Joe

  4. Ash says

    Hi mate

    thanks for the plugin and tips.

    I am facing an issue with slow import, it has taking full day and even at this point the restoration is taking forever. The file size is only 903 mb and upload limit is 32 GB so could you figure out the problem ?

    thanks

    Reply

  6. Bill says

    Hey Joe .. could reduce my file size to 700 MB and was able to import it too .. but the project is not loading properly .. the menu does not work and a few more things are not working .. even media files are missing ,,

    Reply

    • Leron Amin says

      Hi Bill,

      You will need to manually re-import the media files into your project. Your website and layout won’t work correctly until you re-upload the media files. As far as the menu not working, that likely isn’t related to the media files missing.

      Hope this helps,
      Joe

  7. Bill says

    Hey Joe ..

    You had suggested not to include wpcontent folder in the upload ,, i understand you are asking to not involve the following

    Do not export media library (files)
    Do not export themes (files)
    Do not export must-use plugins (files)
    Do not export plugins (files)

    Reply

    • Leron Amin says

      Hey Bill,

      Just select the “Do not export media library (files)”. Media files make up the bulk of an export file. So an 8GB export file without media library files would likely be somewhere around 500mb – 1GB.

      If you know how to use SFTP, then you can simply re-upload your media files to your WordPress install manually.

      Doing this should make the export file more manageable and should prevent it from getting stuck.

      Hope this helps and let me know if you have other questions!
      Joe

  8. Bill says

    i am using the 6.77 version from the link given above ..my file is 8GB + .. but everytime i am trying to import it gets stalled at 21.66 % .. just does not move forward …

    Reply

    • Leron Amin says

      Hi Bill,

      A file size of 8GB is a large import – so I’m not surprised that you’re having issues. I would recommend keeping your export file below 2GB. In order to do this, you may have to create an export without your wp-content/uploads directory, and upload this directory (and all of it’s files) separately – which you can do via SFTP.

      Let me know if you have questions,
      Joe

  14. Jatin says

    Thanks, buddy this worked. Quick question is it safe to upload data via this method I hope there will be no instance of data loss or corruption?

    Reply

    • Leron Amin says

      Hi Jatin,

      I have never encountered any issues with database corruption or data loss, nor have I been made aware of any from other users.

      Let me know if you have other questions,
      Joe

  16. Awais Ahmad says

    Hi bro i am using Updraf plus plugin and my website get infected with malicios script. But i have backup file but the backup files are bigger than the default which is 40M. one of the file is more than 400M. Can you tell me how to fix this problem. I am using wordpres multisite hosted on GCP

    Reply

    • Leron Amin says

      Hi Awais,

      From my understanding, this tutorial doesn’t work with Multisite. You will either have to buy their Multisite plugin or restore the backup manually.

      Let me know if you have other questions,
      Joe

    • Awais Ahmad says

      So what I did I bought the premium version of it and restored my whole multisite network within 15 minutes by using the updraftplus plugin and it went successful.

  17. ETP Online says

    Is this working on the latest version of All-in-One WP Migration(7.27 version) & All-in-One WP Migration File Extension (1.6 version)? or this is only for old versions of this plugins?

    Reply

  18. LAIS says

    I rewrite the MAX_FILE_SIZE to 2 << 33 and the configs into php.ini but return the error:

    The file that you are trying to import is over the maximum upload file size limit of 512MB.
    You can remove this restriction by purchasing our Unlimited Extension.

    Plugin 7.2.2, someone solved?
    (sorry about my english, it´s not my language!)

    Reply

  19. manash says

    The version 6.77 which you gave the link into this article is not that. when it download it shows 7.5. I think you should check the version.

    Otherwise given information is correct and its working on 6.77 version which I download from other sources.

    Reply

  21. tn hindi says

    sir, i try this trick on 7.22 version of All-in-One WP Migration but not working. it shows default file limit. please share more effective tricks for latest version of this plugin.

    Reply

    • Sam Ewdala says

      just got this done by updating the values of upload_max_filesize and post_max_size in the php.ini

      the plugin uses the value that wp_max_upload_size method returns

      this methods exist in the media.php file where it returns the minimum of the two variables I mentioned earlier

  25. Paul says

    Sorry but the code has changed on that file now.

    It shows now at line 351

    // = Max File Size =
    // =================
    define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 );

    WHat do I do?

    Reply

    • Darriel says

      Hi there, After trying several times without satisfying results I noticed that although I install the All-in-One 6.77 version, my WP environment is showing the 7.5 version. I think that its the version that was previously installed.

      I also tried to roll back the Plugin version but I only can do it up to 7.2.
      Also tried to cleaning chaches and repeating the process but nothing happened.

      Is there a way to successfully install and operate the v6.77?

    • Fairplay Mike says

      If you discovering that the hack is no longer working, here’s an alternative method to try that I can guarantee will work every time.

      “PAY the hard working developer for access to their plugin.”

      How would you feel if you sold something on eBay or some other barter/swap/trade/buy site and the buyer figured out a way to get you to ship your product then keep the money they were to send you?

      Pay the fee!

    • Tyrone says

      A mi me mostró la opción en la linea 289, pero sin importar eso y que ahora a mi también me mostró esta línea de código: define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 );

      yo seguí las mismas instrucciones de este post y me funcionó a la perfección.
      Es más, para mi sorpresa el mensaje que me dio al momento de importar fue:
      "Maximum upload file size: ilimitado"

      jajaja pueden creerlo!!

      Muchísimas gracias por el tutorial, saludos a todos.

  26. Jiri says

    I’m sorry, but it doesn’t work. Installation of the lower version plugin performed. Download settings set to 4GB or even unlimited. I select a file from the directory, but nothing happens. The download does not start at all.
    I even have a backup directly and I could do a recovery, but I can’t even see “Restore” functionality is available in a paid extension.
    You could also download the backup and then use “Import from file”.

    Reply

    • Randima Lahiru says

      I got same error. I select a file from the directory, but nothing happens. The download does not start at all. How I perform task. There is any solution/

    • Kent says

      I got this same issue, file limit able to changed to 40GB but when after i choose a file, nothing happen. Import not start. Anyone can help?

    • Najiji says

      I finally found a workaround to this error. deactivate the plugin, rewrite, and reactivate. That worked for me 🙂 Thanks Joe for this trick. It helped me to move my 1.3 gig website flawlessly.

    • Leron Amin says

      Hi Mediajio,

      That’s correct that it doesn’t work on the latest version of the plugin.

      You have to use the older version, as demonstrated in these instructions, in order for it to work.

      Let me know if you have questions,
      Joe

    • Leron Amin says

      Hi Bobby,

      You can just comment out the upload limit line entirely (put // in front of the line) – this will remove any file size restrictions entirely.

      You may also want to migrate your media separately to get the file size down.

      Let me know if you have other questions,
      Joe

    • Vanessa says

      Hi, I tried to do the steps the other have mentioned,
      It worked on my live site but not on my localserver.

      You think its because of my .htaccess upload values?

      # BEGIN WordPress

      RewriteEngine On
      RewriteBase /
      RewriteRule ^index\.php$ – [L]
      RewriteCond %{REQUEST_FILENAME} !-f
      RewriteCond %{REQUEST_FILENAME} !-d
      RewriteRule . /index.php [L]

      php_value upload_max_filesize 128M
      php_value post_max_size 128M
      php_value memory_limit 256M
      php_value max_execution_time 300
      php_value max_input_time 300

      # END WordPress

      What should I do?
      Thanks for the help.

    • good guy says

      try :
      define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 *4 );
      just multiply anyway, it gave me unlimited

    • Ryan Robinson says

      it works in March 2020, I got restored a site i built locally. MUST PURCHASE THE UNLIMITED EXTENSION! But it works with the All one one 6.77
      1. download the 6.77 version of all in one migrate, delete all other copies.
      2. upload the 6.77 All in One to your site. (DO NOT UPDATE)
      3. go to Plugins -> Plugin Editor -> select the all in one plugin in the drop down to the top left, listing the plugins. 
      4. once you have selected the All in One, navigate to the constants.php file.
      5. Do a “quick find”, or search for the “MAX FILE SIZE”
      6. change to: define( ‘AI1WM_MAX_FILE_SIZE’, 536870912 * 20 );
      save file. 

      This will only work if you have purchased the unlimited extension, and use it with the 6.77 version of the All in One Plugin, I dont know why we are required to do so much work to get it working but it works!

  32. Eoin says

    That’s a nifty little way to sidestep the upload limits. I use All-in-One WP Migration a lot. Appreciate you posting this, really helpful!

    Reply

  33. Paula says

    Hello! I
    I follow the steps and it worked (shows 10gb) but when I try to upload the my 770mb site says:

    “Unable to import
    The file that you are trying to import is over the maximum upload file size limit of 512MB.”

    What can I do?
    Thanks

    Reply

  34. Frank says

    Anyone else had this issue when Exporting the file?
    Unable to export
    Out of disk space. Unable to write content to file. File: /opt/bitnami/wordpress/wp-content/plugins/all-in-one-wp-migration/storage/1pklm10zrwx0/(nameoffile)

    Reply

    • Leron Amin says

      Hi Frank,

      Could be that your persistent disk is full. Try running the following command to check the available space on the partition with your WordPress website:

      df

      It’s a relatively simply process to increase storage on your persistent disk. I’d recommend following these instructions.

      Let me know if you have any questions,
      Joe

  38. Faith says

    Please in the line where is the code i wrote “number*20” it didn’t work. after that i tried the code you put above it didn´t work after charging 100% it display only “done praparing the blogs” . Can you help please

    Reply

    • Leron Amin says

      Hi Parks,

      This plugin will not work with WordPress Multisite – you will have to use their paid Multisite version.

      Hope this answers your question,
      Joe

  42. Gustavo says

    Hi Leron
    I downloaded 6.77 version and, when I installed it, it automatically updated to 7.5 (and I didnt even activate it). Anyway, I edited the constants.php and then I activated, but it didn´t work.
    I downloaded 6.65 version and I had the same problem.
    Do you know a solution for it?
    Thanks

    Reply

    • Gérald says

      Uninstaling your current version will not delete it from your wp-contents/plugins/ directory.
      You must then delete the plugin with your favorite FTP client, and install your 6.65 version, and then edit the constants.php file.

      Hope this helps.

    • Arthur says

      Hi I did erased it using filezilla and reinstalled the old plugin 6.6 version but still the version uploaded is still 7.5. Any suggestions?

      Also I tried the site github as one contributor suggested my question is how to get the plugin?

  44. Martinlegui says

    Hello Leron!

    We install the plug in 6.77 (downloaded from the link) and when activated it is version 7.5 (is it possible to update automatically?) And does not work, is there any way to fix it?

    Thank you!
    Martin

    Reply

  45. rahul says

    I used old version than 6.77version because it is not working more. .77 automatically getting updated to 7.5 version.

    but this code worked with older versions.

    thanks

    Reply

  46. Wishful says

    Any new work around? When I use the zips provided here, once installed they say version 7.5 no matter what old version I install. When you make the change it still doesn’t work. Is there a reason or something I am missing?

    Reply

  47. Namita says

    Its is very urgent for me to do import my files. I’m migrating my 000webhost wordpress website to aws wordpress by watching your tutorial. The tutorial is too good and easy but in the last step I got in trouble my import file size is 144mb and All in one wp migration is providing me only 40mb maximum size. I tried to imcrease the size as you taught in your blog (above) but it is not working for me.

    Please help me asap.

    Reply

  48. Lucie says

    Hi,

    I increased the size to 10 GB, but the upload is not working. It’s saying the file is bigger than 512.

    Is this not working anymore?
    Thanks

    Reply

  49. Brajesh Kumar Singh says

    I am not able to update file having

    define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 );
    After changing its not doing anything, can you please help

    Reply

  50. Saqib Nadeem says

    You save my couple of days work if i don’t see this post i need to spend my two days for upload products but with backup and help this post i did two days work in a couple of minutes. Thanks for save my time.

    Reply

  53. Jo says

    Thank you this article. I and many other users of this plugin have suffered loss by the developer’s sudden change in the way the plugin works, making it impossible for those who had backed up their sites with the free version to ever restore their website without ultimately buying their $59 extensions.

    It leaves a bad taste so I am glad about this article that hopefully helps many out there restore their websites.

    You mentioned, “Be aware that the upload limit will revert back to 512MB whenever the plugin is updated, so you will need to repeat this tutorial if you ever update the plugin.”

    My question is:
    1. Why would anyone want to update the plugin if the required version is an older version and updating you lose the opportunity to increase the upload size, or am I missing something here? Will one still be able to use your size expansion suggestion if one updates?

    2. In case not, how does one stop or remove the update notification from appearing again – “There is a new version of All-in-One WP Migration available. View version x.xx details or update now.”

    Thank you.

    Reply

    • Leron Amin says

      Hello Jo,

      Sometimes people will update the plugin by accident. It’s not a big deal if they do – they’ll just have to revert to the earlier version of the plugin in order for the workaround to work again. They could always export and download your working version of the plugin, and then re-import the backup files in case you ever update. There are several WordPress plugins that allow you to download the plugins in your plugins library.

      Unfortunately I don’t know of any way of preventing the update notification from appearing.

      Let me know if you have any questions,
      Joe

    • Rob McDonald says

      I haven’t tried this yet, but If you move the plugin to an mu-plugins folder, that will stop the update messages, but I don’t know if the plugin will still work or not. In theory it should, I just haven’t tested it yet. I just use the version 6.77 and un-install it after I have used it.

      –Rob

  54. Lazsony says

    woooowwwwwww. It works easily! I was thinking of how to raise the money to buy the software before I found this your blog. Thank you very much.

    Reply

  57. Bobby Zopfan says

    I’ve deployed Bitnami WordPress Stack inside GCPlatform.
    In there All-in-One WP Migration is installed by default.

    So, acc to your tutorial, I went into Plugin Editor> Selected this plugin> Constants.php> Searched for desired line. But I couldn’t find this line anywhere. (max_file_size).

    Pls help.

    Reply

  58. Bobby Zopfan says

    Download of the prepared archive fails again and again. It just downloads around 10MBs (of 235 MB total) and fails after around 1 min or so.
    I’m using the latest version of FF and no DL accelerators are being used.

    HEEEEEEEEEEEEEEEEElp.

    Reply

  59. Steward John says

    Been using other plugins to increase the Upload Max File Size but failed to get by backup file restored. Your method is simply amazing and it worked… Thanks!

    Reply

    • Carl's Webdesign says

      Go to add plugin and install WP Filemanager and you can navigate to wp-content ==> plugins ==> plugins ==> all-in-one-wp-migration,
      then right click on constants.php and edit the required line.

  63. Lia Liali says

    Thanks a million for this tutorial, even more thanks for the 6.77 version of the plugin.
    (Also thanks to Mahniti Tapir’s comment.)

    I installed the 6.77 version in the destination domain and then, via plesk, I uploaded the backup in /wp-content/ai1wm-backups folder.

    After that, in wordpress dashboard, I used ALL IN ONE WP MIGRATION –> Backups . I could see my backup and I chose Restore.

    Worked like a charm!

    Reply

  64. Ernest Akpos says

    Hello Leron
    Awesome job you are doing. I wanted to restore backup using this plugin, but i get a message that the function has been moved to a paid plugin. Is there a way around this? i would really appreciate. i am frustrated now

    Thanks

    Reply

    • Leron Amin says

      Hi Ernest,

      You have to use an earlier version of the plugin in order for the restore function to work – I mention this in the grey box in the tutorial introduction, where I also provide a link to the earlier version.

      Let me know if you have any questions,
      Joe

    • Ernest Akpos says

      Hello Leron
      Thanks for your reply. i used the older version like you advised and made a little progress. But I have a problem. The .WPRESS file size is 260MB. Whenever i try to import the back up i get stuck at “Importing database 0%”or “Restoring 18585 files… 77% complete”. I have googled a bit about the problem and read a comment that says that to solve this problem i need to go to php and increase the max_execution_time and max_input_time to their maximum setttings. “contact your new hosting to increase php memory limit / upload max size / one of those limit thing” – this is another comment i saw to solve my problem. Please how do i do all these on google cloud? Thanks for the help so far. I appreciate

  65. Spamhere says

    Simple hack for the latest version.

    Download the latest version. Then go to ‘imports’. Click on ‘get unlimited’. Download their free version that ups the download to 512mb. Upload the plugin (it creates a second plugin called ‘extension’).

    Then follow instructions as stated above. When you get to step 5 you should see the following instead:

    // =================
    // = Max File Size =
    // =================
    define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 );

    All you have to do is change '28' to some very large number like '1000' and then everything should work.

    Just worked for me.

    Enjoy!

    Reply

    • Tom says

      This no longer works……they must have updated….my website is over 800mb. Already changed nameservers, so now I’m stuck unless I pay for premium……..very frustrating.

    • Ernest Akpos says

      The plugin is just too expensive. If the owner had made it say $35 or less one will consider buying. And he goes around blocking ways shared to help get around buying premium.

    • MK says

      Totally feel the same. Would’ve bought it for $30,-, seems a fair price considering this plugin could be used for free for years. Now feel determined to make this work, as this is just asking too much. It costs more than my wordpress theme…

    • robert says

      install rollback plugin on wordpress. Then rollback ai1wm to the first version. And then do the process.

  66. Bella Hella says

    Version 6.77 no longer works.

    1) If you try to export, it will be stuck for a long time.

    2) If you mod the constants.php max file size and try to import your backup file you will get error message, “ai1wm_compatibility is not defined” (see screenshot : https://monosnap.com/file/MpZXWJnJQWfkFtdLLffilpzrykVMkK)

    Problem 1 and 2 is gone immediately when you upgrade to their latest version (Ver 6.83).

    The plugin author (servmask) is levelling up.

    Reply

  70. Ineh Marve says

    To increase your upload limit in this plugin, just update or edit the .httaccess file in your root domain folder.

    # BEGIN WordPress

    RewriteEngine On
    RewriteBase /
    RewriteRule ^index\.php$ – [L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . /index.php [L]
    php_value upload_max_filesize 1000M
    php_value post_max_size 1000M
    php_value memory_limit 256M
    php_value max_execution_time 300
    php_value max_input_time 300

    # END WordPress
    # BEGIN LiteSpeed

    SetEnv noabort 1

    # END LiteSpeed

    fix in the size you went in the upload-max-filesize and post_max_size

    This work for me

    Good luck

    Reply

  71. John says

    When I follow your steps and hit the update button it says “Unable to communicate back with site to check for fatal errors, so the PHP change was reverted. You will need to upload your PHP file change by some other means, such as by using SFTP.” I can’t get it to work need help please 🙁

    Reply

    • Jay Weaver Sr says

      John, I got the same message, what I did was go into cpanel, go to to the plugins folder inside the wp-content folder, and edit the constants.php file in cpanel, just highlight the file, then click the edit button, after you edit Line 284 to define( ‘AI1WM_MAX_FILE_SIZE’, INF );
      then save the file. Close the cpanel login to wordpress.
      This worked for me.

    • John says

      I can’t use the cpanel. Like an idiot we signed up for host gators wordpress only option which does NOT give us cpanel access and in order to access the cpanel all we can do is let the folks who work at host gator access it for us or pay for a higher plan and they said we would have to pay for basically a new plan with cpanel because they cannot do account adjustments to just let us pay the difference. Sorry so your method will not work for me as I do not have cpanel access at all.

  72. Ei Salita says

    Hi. I was able to increase the limit to 30gb. However, when I am trying to upload, it still says “The file that you are trying to import is over the maximum upload file size limit of 512MB.”

    What seems to be the problem?

    Reply

  74. Darren Grant says

    Great article and thread.
    I’ve been doing this for a year… but come to December the latest update has stopped this fix.

    But with the download of 6.77 – this works a treat. Love it. Great, great share Leron.

    Reply

  75. Roger says

    Hi

    My host company don’t allow uploads greater than 96MB. Your suggested approach to adapting the All-in-One WP Migration plugin files wont get around that will it?

    Thanks

    Reply

    • Mahniti Tapir says

      But maybe you can upload backup via cPanel directly to /public_html/wp-content/ai1wm-backups
      Then go to the plugin and then to backups —> Restore.

    • Tzn says

      This is no longer an option since plugin author decided to limit this basic option to payed plugin.
      In bird culture this is considered a dick move.

    • Niharika Bitra says

      Mines says Maximum upload file size: 40 MB and I’m using version 6.82. This fix is not working.

    • Don says

      After file Upload Issues

      Thank you all for the support here. After exporting and importing to a new site, everything worked within a split second. But currently my site is down (aside front page, no other other urls were accessible). I corrected permalinks it didn’t work. I edited .Htaccess then my site came back live. But l couldn’t login. So l deactivated a security plugin through phpmyadmin and now my site is totally broken.

      Please help l don’t know what to do next.

    • Ian W Bowden says

      I’ve downloaded v6.77 from your website (confirmed in Plugins within WP) and opened the constants.php file. Line 245 does not have the Max File Size info – it’s on line 281 – and doesn’t look at all like what you’ve indicated. It looks like this:

      // =================
      // = Max File Size =
      // =================
      define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 );

      So where do I place *20?

    • User says

      define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 30 );

      If you put this you get 2GB (<<30 is an exponent and give you the value in Bytes)

  81. Nancy Spencer says

    Surprisingly, Restore functionality has been closed for free users with the latest version 6.80 of AIOWM. Just saying because I got a bit disappointed with this update 🙁

    By the way, thank you very much for this tutorial Leron, very helpful, clean and clear to follow.

    Reply

  82. Trevor Gordon says

    This does not seem to work for version 6.80.

    I have changed the settings and it shows as 40GB but when I go to import my 640mb file, it still gives me the message “you need to upgrade…512mb is maximum….”

    Has anyone else experienced this?

    Reply

  84. Dan says

    I tried to upload 840MB, passes 100% but still thinking, there is no message of processing. I got the limited raised by hosting up 1GB

    Reply

  86. Derick says

    Ok so the latest version that will work for the above is
    Version 6.71 which works with rollback plugin

    // =================
    // = Max File Size = constants.php — line 284

    Then up to

    VERSION 6.77
    // =================
    define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 *10);

    After that you have to purchase pro addon unless someone else can fork it .. As these changes you make are done to the GPL- Wp version this is 100% legit.

    Reply

  89. khaylings says

    excelente post pero como dijo otro esto no servira en el programa actualizxado deben descargar la version de antes muchas gracias

    Reply

    • Amir says

      // =================
      // = Max File Size =
      // =================
      define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 30 );

      I've edited it this way but it still showing limitation of 8MB

  90. Damiano says

    Hi, i go to overwrite the line ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 with 33 but the limit not change to 128 megabyte, why? i do the change with the plugin editor in wordpress

    Reply

  92. Sven Thimsen says

    Hey.

    i downloaded the older Version (6.77) and uploaded it on WordPress.
    But it doesnt look the same like in your tutorial :/
    im my line 249 it says:
    define( ‘AI1WM_ACTIVE_TEMPLATE’, ‘template’ );

    I find the max file size in line 284
    define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 );

    But when i changed it like you described in the tutorial and saved it, nothing happened. You know why?
    Would be awesome if you know an answer 🙂

    Reply

    • Leron Amin says

      I recently reached out to another user who mentioned this. If you increase the upload limit for the original plugin (as demonstrated in the tutorial), and then download the new import extension and try to import a large WordPress website – will it work? If you give it a try, please let me know how it goes!

    • GEC says

      Changing the upload limit (i.e. ‘AI1WM_MAX_FILE_SIZE’ ) will NOT work in the new 6.78 version. It appears that the new “file import extension” that you must install checks to see if you have the paid PRO version installed.

      So stay with version 6.77…don’t update.

    • Leron Amin says

      Thanks for letting me know! I’m curious if using the WP Rollback plugin to revert to the previous version could provide a simple fix? If you end up testing it before I do, please let me know if it works.

    • Peter says

      Hi guys, I have checked it. It still works also after changing the system. Update the plugin and install new plugin extension. Then edit All-in-one WP Migration plugin and in constans.php change line 284 from define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 ) to define( 'AI1WM_MAX_FILE_SIZE', 2 << 33 ) . Save it and you will get unlimited upload.

    • Peter says

      Hi guys, I have checked it. It still works also after changing the system. Update the plugin and install new plugin extension. Then edit All-in-one WP Migration plugin and in constans.php change line 284 from define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 ) to define( 'AI1WM_MAX_FILE_SIZE', 2 << 33 ) . Save it and you will get unlimited upload.

    • John Doe says

      Your solution unfortunately doesn’t work.

      Yes, it shows max upload size 16GB. BUT. If you chose a file of 4GB for example like I tried in mine you get the following error:

      Importeren niet mogelijk
      The file that you are trying to import is over the maximum upload file size limit of 512MB.
      You can remove this restriction by purchasing our Unlimited Extension.

      I’m not a real programmer. So maybe other people find their way around this. Good luck!

  102. priyanka says

    I tried and it changed to 2GB, I imported the file and it completed 100% but then I got error “Unable to import
    The file that you are trying to import is over the maximum upload file size limit of 512 MB.
    You can remove this restriction by purchasing our Unlimited Extension.”

    any solution?

    Reply

    • Leron Amin says

      Hi Priyanka,

      Did you remember to save the file after you changed the max upload size?
      Also, if you updated the plugin after making the change, you will have to change the max upload limit again.

      I would go through the tutorial, make the change, and then try the import again.

      Good luck and let me know if you have any questions,
      Joe

  104. rahul says

    thanks, it worked. I changed the whole line define( ‘AI1WM_MAX_FILE_SIZE’, * 20 );
    to define( ‘AI1WM_MAX_FILE_SIZE’, 536870912 * 20 );

    Reply

  107. Abdullah says

    Hi,
    there is bit change in latest version
    Instead of 536870912 * 20 they have changed like 2 << 28
    So we have to change the whole 536870912 * 60

    Cheers
    Thanks for the help.

    Reply

  115. Bella says

    Simply go to the File manager of your cpanel or FTP and download Constant.php, change the values inside and upload it. It worked for me.

    Reply

  116. Doug says

    Thank you so much for this tutorial.

    I wanted to give an update…The code has changed just a bit.

    // =================
    // = Max File Size =
    // =================
    define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 );

    This is what it looks like now and if you put the *10 in there….

    define( 'AI1WM_MAX_FILE_SIZE', 2 << 28 *10);
    I'm not sure what "2 << 28" means but multiplying it times 10 does some pretty crazy math. It goes unlimited.

    If you put in there *2 you get like 135,000+TB.

    I used 1.2 and got 16GB upload.
    define( 'AI1WM_MAX_FILE_SIZE', 2 << 28 *1.2 );

    Cool hack and I totally agree…If you can afford it, buy it. If you/we don't… This hack will only be good for so long, dev's kids need shoes too.

    Have a good day.

    Reply

  121. henry says

    I came here via your youtube video. Your video helped me a lot, i was able to transfer my website with over 27GB (took very long).

    I used the idea of commenting out the file size as mentioned by the user (Caleb Higginbotham )but in my case //define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 ); and I had UNLIMITED 🙂

    Initially i was getting an error message when I edit and save the code – Scrape nonce check failed. Please try again.

    How i resolved: I disabled All in One Migration plugin and then edited and and reactivated and it worked perfectly.

    Thanks for the great post.

    Reply

    • Leron Amin says

      Hey Henry,

      That’s awesome – I didn’t think the plugin could handle a transfer of that size. I guess I underestimated it! 😉

      Also, thanks for the helpful tip on solving the ‘Scrape nonce check failed’ error.

      Talk to you soon,
      Joe

    • Olamide says

      @Henry

      I am having problem transferring on one of my 2011 blog, it has accumulated upto 48GB data, i keep getting server timeout.

      I have contacted my host about it, but they keep telling me to Upgrade, any help?

  122. Caleb Higginbotham says

    Hello great tutorial! Really helped me with my just under 1 GB WP site transition.

    Just a thought here, why not comment out the entire thing? It makes it unlimited instead of being for a defined amount and has the added benefit of no longer displaying a limit.
    Of course you will still have the “Get Unlimited” button but you can just ignore that as this will still give you the unlimited upload amount.

    Okay so the code is pretty simple just add two forward-slashes “//” at the begging of the defined line. Example below.

    // =================
    // = Max File Size =
    // =================
    //define( ‘AI1WM_MAX_FILE_SIZE’ , 536870912 );

    That’s all there is to it. In more recent versions of this plugin the exact line of code has change. It’s simple enough to do a search for it though. Command+F (Mac) or Ctrl+F (Windows) “Max File Size” should find it quickly.

    Reply

    • Leron Amin says

      Hey Caleb,

      You make an excellent point – I never thought of completely removing the MAX_FILE_SIZE definition.

      Thanks for providing this great workaround, as I know that many other users will find it useful!

      Joe

    • MK says

      THANK YOU SO DAMN MUCH!!!
      This most simple workaround – too simple to even dawn upon me or most people, which makes you a genius! – was the only thing that worked! I spent over 2hrs downloading different versions, trying different things… this was literally ALL it took.

      THANKS! 🙂

  123. abdoulaye diallo says

    Hi I show this tutorial its very important but it’s not working for me i have tried two methodes . in the line where is the code i wrote “number*20” it didn’t work. after that i tried the code you put above it didn´t work after charging 100% it display only “done praparing the blogs” . Can you help please

    Reply

  124. Fig says

    The change from 2<<28 to 2<<33 worked fine for me. But could someone explain what the notation 2<<28 and 2<<33 means for setting the AI1WM_MAX_FILE_SIZE ?
    Thanks!

    Reply

    • Fig says

      I figured it out. 2 << 28 is a 'bitwise shift left' operator. Changing it to 2 << 33 will give a max_file_size of 16 GB. Using 2 << 30 yields a max size of 2 GB, 2 << 31 gives 4 GB max, and 2 <<32 gives 8 GB max file size.

    • Rakesh Kumar says

      Hi,
      I have tried many times to change but this message is always visible. (Unable to communicate back with site to check for fatal errors, so the PHP change was reverted. You will need to upload your PHP file change by some other means, such as by using SFTP.)

      So can you help me

  125. GeeKayM says

    Hi,

    Thanks for your excellent blog !

    Reg: AIM plugin, this has been updated a few days before, and the code looks like this:

    // =================
    // = Max File Size =
    // =================
    define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 );

    // ==================
    // = Max Chunk Size =
    // ==================
    define( 'AI1WM_MAX_CHUNK_SIZE', 5 * 1024 * 1024 );

    // =====================
    // = Max Chunk Retries =
    // =====================
    define( 'AI1WM_MAX_CHUNK_RETRIES', 10 );
    —-

    If we change the Max File Size without changing the other two parameters, will it have any effect on the performance of the plugin?

    Thanks once again !

    Reply

  126. Derrick says

    I did it by changing the 28 to 33 – but it still gave me header errors – I was able to transfer the site – just delete the all in one migration folder via ftp after the install. Do the permalinks and all should be fine.

    // =================
    // = Max File Size =
    // =================
    define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 33 );

    Derrick

    Reply

  128. Mikel says

    With the new update, the code changed. Now it appears:

    // =================
    // = Max File Size =
    // =================
    define( ‘AI1WM_MAX_FILE_SIZE’, 2 << 28 );

    How should we proceed now?
    Thanks a lot.

    Reply

  130. farshad says

    tnx man work perfect now i dont have money soon i will donate this plugin is true we cracked now and using but is not good way we should donate this plugin

    Reply

  131. Moiz says

    Hey Leron, I am getting this error message,

    Unable to communicate back with site to check for fatal errors, so the PHP change was reverted. You will need to upload your PHP file change by some other means, such as by using SFTP.

    Reply

    • Leron Amin says

      Hi Moiz,

      That’s the first time I’ve seen that error mentioned.

      Take a look at this WordPress thread published by numerous other WordPress users who encountered the same problem.

      Please let me know if you’re able to find a solution!

      Talk to you soon,
      Joe

    • Leron Amin says

      Hi Rore,

      For how long does it stay on the “Restoring database…” status? Does it ever make progress?

      Talk to you soon,
      Joe

  136. Kaibron says

    Hi Leron,

    There are no numbers on line 249, there is Just: define (‘AI1WM_MAX_FILE_SIZE’, ) ;. Can we still add * 20?

    Reply

    • Leron Amin says

      Hey Kaibron,

      The * 20 is simply a multiplier, so you will need to define an initial sum before adding the multiplier.

      For instance, this will NOT work:

      define( 'AI1WM_MAX_FILE_SIZE', * 20 );

      This WILL work:

      define( 'AI1WM_MAX_FILE_SIZE', 536870912 * 20 );

      Let me know if this helps, and please reach out if you have any questions!

      Talk to you soon,
      Joe

    • Leron Amin says

      Hi Edwin,
      I’m not sure that this error is related to the tutorial, as this is the first I’ve heard of it. This more than likely has to do with your DNS configuration.
      I would recommend Googling the error and see what solutions you find.
      Let me know if you have any questions,
      Joe

  143. Naseer Khan says

    Hy thank you so much for such an amazing tutorial, I have a question , my website size is almost 5GB , here in Pakistan it is not possible to import such a huge size website due to internet issue, So I am thinking to do via dropbox etc, but those extensions are also paid, so what should I do, please guide, my hosting plan will expire very soon.

    Reply

    • Leron Amin says

      Hey Naseer,

      Large website migrations are difficult for even the most experienced developers. Not only that, but they require a network that can handle the transfer of large amounts of data within a relatively short period of time.

      Here are some tips I can provide to help make the process less painful when using a ‘slow’ network:

      1) When transferring your database, don’t use the phpMyAdmin graphical user interface. Instead, ‘backup and restore’ your database directly from the command line. More instructions on this here.

      2) When transferring your core website files, do it overnight. What I mean by this is to prevent your computer from going to sleep, and let FTP transfers run overnight while you’re sleeping. This is a good way to save time and let the transfer take place undisturbed.

      I hope you find these tips helpful. Remember, always do things through the command-line whenever possible, as it will save a tremendous amount of time.

      Please feel free to reach out to me if you have any questions,
      Joe

    • Naseer Khan says

      Thank you so much, Leron for your suggestions.
      I am thinking about one thing, what If I use RDP for this purpose, as on RDP internet speed is fast, what do you think?

    • Leron Amin says

      Hi Naseer,
      I have never used RDP for this purpose, so I’m unsure whether or not it would be appropriate.
      Also people have mentioned using rsync for large file transfers. You should also have a look at this thread about how large companies migrate projects without experiencing any downtime.
      Let me know if you have any questions, and if you find a good solution.
      Thanks,
      Joe

  144. Jessica says

    OMG, THANK YOU!!!

    I couldn’t afford to renew my hosting because they want you to pay for a whole year at a time and we just took a severe hit in income. I used the free version to move most of my sites over, but one was nearly 1 GB and I was panicking because I couldn’t afford $69 for the paid version.

    This worked and my site is saved!

    I do plan to buy this plugin later, because it’s an amazing plugin. I just can’t do it right now and didn’t want to lose this site.

    Reply

    • Leron Amin says

      Thanks for the feedback Jessica – I’m glad the tutorial helped you.
      Please keep in mind that your VM has to be running PHP 7 to successfully migrate WordPress installations that are greater than 2GB, or else you may encounter this error (unable to seek to offset file).

  145. Thomas says

    Hey hello thanks for your tutorials
    I am using bitnami WordPress multisite so how can install the plugin ? ^^

    Reply

    • Leron Amin says

      Hi Thomas,
      I don’t believe this plugin is compatible with multisite – you will probably have to migrate your websites manually.
      I base this statement on the fact that the plugin manufacturer offers a multisite ‘extension’ for $199.
      Let me know if you have any questions,
      Joe

    • Leron Amin says

      Hi Rob,
      I don’t think there is a maximum export size, but I may be wrong – I’ve just never encountered the error before.
      If you try to export a site file that is larger than 512mb and it doesn’t work, please let me know.
      Thanks,
      Joe

  152. Isabel Da Guerra says

    Lol just saw this too late… I got the paid version darn 😉

    Anyways, busy wrapping up for the day/2017 yearend…

    You have truly been a great help (a ‘return to my bookmark’s folder’ kinda help). One of a kind at Q&A support. Kudos to you Leron.

    May you and yours pick up little rainbows along the way in 2018.

    Reply

    • Leron Amin says

      Hey Isabel,
      Well someone has to support the plugin developers – so I’m glad you do.
      And thanks for the feedback. I should also thank you for all of the tips and solutions that you posted on the blog; they were all very helpful!
      Happy New Year to you as well, and I hope I will hear from you often in 2018. 🙂

    • Ajarn Spencer says

      Indeed important to support the developers when one can afford it and one’s website is worth the money. But for those who cannot afford it this is a good solution. Those who have money to pay should pay or donate if satisfied, and those who are too poor should use this excellent hack

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