You are seeing this message because the file that you are attempting to import/export is larger than 2GB and you are using 32-bit PHP.
32-bit PHP does not support files larger than 2GB.
You can either:
1. (Recommended) Install 64-bit PHP. PHP version 7 is the first official version of PHP with 64-bit support for Windows and can be downloaded from PHP’s official website: http://php.net/downloads.php
– or –
2. Reduce the size of your backup
If you need assistance with reducing the size of the backup you can email our support team: firstname.lastname@example.org