I'm not using AUFS.
Now that the owner has changed you will have to delete the files via cli unless your change owner back to ulf
What if I just let the owner as it is now: root??
I don't really understand what you mean here. What should chown and/or chmod for files/folders be like to be ok for Emby??
If I move new stuff to the music folder ls -l gives me the following:
Albert Hammond and Arcade Fire were newly copied to the NAS, Michael Jackson is the folder that was 'repaired' by the permission reset and test is a folder I just created on my mac over smb.