Hi @Don_23805
Thanks for your post!
It makes sense that your computer can access the files from it’s drive, but can it access them via the network? If you go (in Windows) to Computer/PC » Network » rNetwork name of your PC] do you see the network share, and can you access it there? If not, file sharing may have been disabled on the computer.
Another possibility is that the computer may have seen a change in the network (for whatever reason) and decided to mark what it considers to be a “new network” as a Public one, meaning that it will refuse communications with other devices on the network.
And another is that there’s firewall software installed that is blocking the connection.
To be honest, I can think of many possibilities off the top of my head - I recommend you get in touch with our technical support team, who have tools at their disposal that will allow them to give you advice specific to your Sonos system and what it reports, and also to assist you with the fix.
Probably the easiest step to take that might fix the problem is to uninstall the Sonos app from your PC and reinstall it. If that doesn’t work, please call in (a phone call would be better suited to getting help on this particular issue than a chat).
I hope this helps.