Music Library not adding

I’m having real problems adding my music library from my WD network drive. I’ve found a few suggestions that it might be cause I have quite a large collection but even after splitting the music into smaller folders (“A” for all the A artists, “B” for B etc) and adding these folders individually to the library folder source. and letting plex scan and complete before adding each folder. It just stops scanning after about 53 artists. Any help at all would be appreciated.

A Premium Music library doesn’t work with one folder filled with music.
It only works if you break your files down into a folder structure Music - Artist - Album
see https://forums.plex.tv/discussion/comment/1093611/#Comment_1093611
and
https://forums.plex.tv/discussion/comment/1050849/#Comment_1050849