[andreaskagedal]

Is there anything you can filter on to quickly limit the songs list to only showing songs from that fakebook? If so, use that filter, then long press to select a song, tap the select all icon in the floating toolbar at the bottom right corner and then tap "Delete". This will delete all of the songs from the library.

Mike

Ah, yes there was. It was imported as a collection. Unfortunately, I did something very similar to what you propose, but in the "Collection" view. But in that view, the "remove/delete" option only removed them from the collection, not from mobile sheets. I tried to see if there was an "undo" option for this, but could not find one.

And I guess it is not possible to filter on shared file (every song using this file).

Do I understand correctly that the general behavior is that the file is removed when the last song which refer to it is removed?  But how can I know that all songs have been removed (if I messed up the collection-tagging, or similar)?