Telling Plex to ignore music files already processed?

There is completely new code coming for music in a few weeks. This all will change.

I have another refinement to rename and move the tracks automatically with mp3tag:

Now it will create an album folder if an Album tag is present and if not, it will place the track directly into the Artist folder.
If there is an AlbumArtist tag, its content will be used. If there is only a TrackArtist, it will be used instead. (So make sure to tag mixed albums with a common AlbumArtist if you don’t want these albums to get broken up.)

Only if a track number is present, it will be added to the file name.
If a Disc Number is present, appropriate subfolder will be made per-disc.

(This string will still malfunction if the disc number is stored in the format 1/2.: I have yet to find a filter string to remove the part after the slash.)

E:\MP3\$if2(%albumartist%,%artist%)\$if2(%album%\,)$if2(Disc $meta(discnumber)\,)$if(%track%,$num(%track%,2). ,)%artist% - %title%

Replace the absolute path at the beginning with the path where your library is.

You should still only go album by album and use the ‘Preview’ feature to catch any unforeseen behaviour.