A bunch of songs in a common folder doesn’t work in plex.
This approach is unfortunately not compatible with how Plex is handling music.
In Plex, every song is part of a “release”, (i.e. album, EP, single etc.)
All tracks within one such release share their album art, their release title, and their “album artist”.
Mixing several different tracks within a release doesn’t really work, unfortunately. They most likely will end up getting assigned to the same release (commonly called “album”), which means they will also share their album title and artist.
If you want to separate each track, you should separate the files and sort them into a folder hierachy which separates their Album Artists, and inside each artist folder, contains all the releases of that artist in a separate album folder. https://support.plex.tv/articles/200265296-adding-music-media-from-folders/
TL;DR: throwing a bunch of songs into a common folder and expecting to see them appear as a playable album or playlist in Plex does unfortunately not work.
