Please add the option to exclude files and folders. Just like the pre-flight shows the large files to exclude it would be nice to be able to have like a file explorer to browse and mark files / folders to be excluded. See ManageWP Exclude options for backups.
Although I excluded the large files (Snapshot backups) Shipper still warn that the total is 300+MB which can take hours … But there was nothing I could do. I could not exclude for example the full Snapshot folder.
In spite of that, the migration was successful as opposed to Siteground's migration tool which failed ungracious with no clear reason. Congrats for a nice tool. It will feel much more complete once we can choose to ignore file and folders. Cheers!