By carefully following hints on this Community I was able to once again view my Music Library through the Sonos App. I have an older iMac and did the following: This must be done on the web based Sonos app. There is no method using IOS on iphone.
- Enter File settings and change sharing to SMB
- Give proper permissions to Sonos to view Music folder.
- Enter correct path-link to My Music folder.
- Enter the Sonos app (web based on iMac) and Add Music folder using NAS.
Having done all this the following observations are made:
- There is no way at present of searching My Music Library through the sonos IOS app.
- Searching the Music Library can be done in two ways: through Spotify Library search or through Sonos search on the web based app.
Good Luck to All !