WordPress Migrator There is not enough free space on your new server error
If you see the “There is no enough free space on your new server” message this means that there is not enough disk space for the website to be transferred on your new hosting. You can monitor the disk space usage of your sites in the client area. Go to your Client Area > Services > Hosting. Click on the Manage button next to the corresponding plan and choose Statistics.
To resolve the problem you can either remove some of the contents from your SiteGround hosting in order to free up some disk space or upgrade to a package with higher disk space limits.