You issue is not the same as the other guys so moved this to a new topic. his library content disappeared completely. What do you mean exactly by “re-adding”
I’ve added a folder about two weeks ago and for some reason, it is re-adding that folder again for no reason after somehow the content how disappeared.
You have separate folders with for music based on alphabetical listing
like all your A artist are in /storage/BEE89DA2E89D598B/Plex Media/Music/Artist (A)/ and you have each of those set up for your library? is that correct? (I am assuming you have an Artist (B) folder as well and so on.
Sorry for the delay. Yes, for some odd reason it started to re-add, but as of today music is adding normally with a lot of album art not being applied from my files.