Item Structure:
F:\Music - Rock
…Pink Floyd
…Pink Floyd - The Wall
…Disc 1
…tracks
…Disc 2
…tracks
I find MP3Tag the only way to fly (here is ‘Disc 2’ - note: ‘Discnumber’ entry):
I have never actually needed The Plex Dance® for music libraries… but… just in case:
The Plex Dance®:
- remove show/movie from library
- update library
- empty trash
- clean bundles
https://support.plex.tv/hc/en-us/articles/200392106-Library-Actions <— update library, empty trash, clean bundles - bring names and structures into compliance/ or the ultimate bundle reboot operation/ or a generic ‘Re-Do’ Operation
- replace corrected show/movie into library
- update library
All Steps. In Order. No Shortcuts.