Your server kills the process if it takes too long.
If your server has low limits, the plugin cannot process large files. You can try increasing these values in your control panel or configuration files : Add lines for php_value upload_max_filesize 128G php_value post_max_size 128G upload_max_filesize = 128G post_max_size = 128G memory_limit = 512M functions.php allinone wp migration 100gb fix
This method works 100% of the time for sites up to 200GB, provided you have or a robust file manager (cPanel). You do not need to use the web uploader at all. Your server kills the process if it takes too long