bluelinq-computers
If you've already opened a ticket with Enhance and that didn’t help, try this: take any of your app servers, add the backup role to it, move one or two websites over, and run a couple of manual backups. If everything runs smoothly and backups remain incremental (which they should), then it’s probably best to ditch the old backup server, reformat it, and set it up fresh with EXT4. That should take care of the space usage issues.