I have:
1. Reset file sharing and included the library in shared settings
2. Verified date and time are both set by internet
3. Turned off all firewalls
Please help, Sonos connected immediately and then denied access days later....
Best answer by wadenfor
The issue was that not every folder in the path to my music was shared. So by sharing each folder along the way, Sonos could finally find its way to the music folder.