AC/DC is an annoying special case.
When I created my library, I had to resort to naming the artist folder ACDC. (i.e. without any separator inbetween. The dash is interpreted by Plex as a separator between album artist and album title. see https://support.plex.tv/articles/200265296-adding-music-media-from-folders/ )
In the embedded meta tags, I use then the correct name AC/DC.
You can continue to use the hierarchical folder/subfolder approach of
Artist / Album / tracks, but this is one of the cases where it breaks down.
