The problem with Borg is that it requires an actual mounted FS or SSH (with a live mounted FS on the other end). You can't just point it at offline storage. To

The problem with Borg is that it requires an actual mounted FS or SSH (with a live mounted FS on the other end). You can't just point it at offline storage. Totally a great option if you do have live storage to backup to but personally I don't have a full server worth of disk spare at any given time.