Hi @mattzab,
The backup feature is pretty raw, as its a pre-beta version of backup that managed to slip out into the odrive Agent. It works, and there are folks out there using it, but it may have some quirks.
There is a backup log you can view. Maybe it can give us some additional details. If you installed the odrive agent via the instructions in our documentation, the log is in ~/.odrive-agent/log/backup.log. Can you take a look there and see what it says?