Cool. Level headed approach.

Yeah the user:group mapping was correct. I did work it out though. It was the storage volume being full, it presented as not being writeable! My mergerfs config wasn’t quite right. As soon as I set it to most free space it was working again.

It’s just funny that I didn’t get the same error in Radar.

PID/GID 1000

Can I pick your brain on this? I have my folders set to 1000:1000 , Radarr can import the movies folder but Sonarr complains about the tv folder not being writeable by user abc.

The tv folder looks to have the same permissions to me though? Any idea what could be up with that?