There are 4 ways that you can choose to increase the maximum upload file size in WordPress.

1. Use our plugin (easy)

https://import.wp-migration.com

2. Update .htaccess file (hard)

upload_max_filesize – set this to a value > than your backup
post_max_size – set this to a value > than your backup
memory_limit – set this to a value > than your backup
max_execution_time – set this to 0 (infinite)

3. Update wp-config.php file (hard)

upload_max_filesize – set this to a value > than your backup
post_max_size – set this to a value > than your backup
memory_limit – set this to a value > than your backup
max_execution_time – set this to 0 (infinite)

4. Contact hosting provider (medium)

Reach over to the customer support of your hosting provider and ask them to increase these limits for you

If you are still unable to import your file, the easiest way to figure out the problem is to request error logs from your hosting provider for your website. Examine the logs around the time when you tried to import the backup.
You will see what limit you have encountered and increasing it will solve the issue.

 

collected from: help.servmask