Ok, I'm completely lost. I've got a perfectly generic UnRaid config, trying to back up /mnt/cache/appdata/ to /mnt/user/CommunityApplicationsAppData/appdata/
It runs the backup without errors, and creates the dated subdirectory... but it's empty. No .tar, no nothing. I've tried with compression both on and off. I've got to be missing something obvious, right? Changing it to /mnt/user/appdata/ results in a full backup.. but the data lives on the cache anyway, so I'm not sure why the default value isn't working!
I didn't change anything else in the CA AppData Backup configuration, no excluded folders, etc. It stops the dockers fine, ought to be backing up binhex-plexpass's data. Total size on cache is 2.65 GB.