[deanhills]

UPDATE:  Previously I've been able to restore WordPress sites with the All in One WP Migration Tool with no hazzle but as of version 5.68 the authors of the plugin has added a limit to the size one can export and import. The reason being that it would be up to the server provider to increase that limit for WordPress - so the change makes it so that the server rules are followed for the size that can be exported and imported - which is 512MB with the plugin.  The message that came up for me however was 1MB.  

Next thing I Googled the problem and then finally found this solution works best - a plugin extender for the All in One WP Migration tool.  However caution is advised as this plugin does not come from WordPress so means it hasn't been audited and can be a security risk:
https://import.wp-migration.com/

While I was doing my research I came across this solution as well that I may try out in my next attempt - only problem is since the size limit will default with every plugin upgrade, one would have to make this change very time when the plugin is upgraded:
https://hibulletbabu.blogspot.com/2017/0...n-all.html

All you need to find this file

Code: (Select All)

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

Open it From your Code Editor.

Find these Lines in it, May be on Line 200.

Code: (Select All)

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

As you can see the Max file size limit is already set to 512MB.

Now Replace it with

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// =================
// = Max File Size =
// =================
define( 'AI1WM_MAX_FILE_SIZE', 5368709120 );

It will increase it’s size upto 5GB you can also use more then 5GB.

And Now save your file.

Now Go to All-In-One Migration >> Inport and you will find your MAX Upload size is Changed to 5GB. You can Now also Export file upto 5GB.