Music server cannot be found

Try removing and re-adding your music library.

If problems persist, tell us exactly where your music library is stored (NAS, USB, PC, Mac etc). Also which BT router (though historically speaking every BT router is janky in some way).

I had the same issue with an external SSD connected to the USB port of router and set to USB share on the Network. I was able to add the music library off the SSD in Sonos but doing updates to the music library didn’t work and got the same message you did.

So, I purchased a SanDisk Cruzer Fit thumb drive. Loaded it with my music again. Plugged it into the router USB port and now everything is working normally. Sonos can access the flash drive and can update the music library.

Well I spoke too soon above. I added a new MP3 to that shared, network USB flash drive. Did an “Update Music Library” and now Sonos doesn’t detected the shared drive anymore.

Makes no sense. 

Does your router require a mount and unmount operation for the USB drive port?

No. Never had to unmount it. The USB has been attached to the router since I got it.

Which router? Maybe someone else has an idea.

Every time I see a nas/router/pc music library post I’m loving my Raspberry Pi SMB server more and more. :-)

The router is a TP-Link Deco BE63 mesh router.

Not much here: https://www.tp-link.com/us/support/faq/3341/

Maybe try rebooting the router once you reinsert the USB drive?

I’ve read that page several times and my USB flash drive is setup and attached. I don’t remove it. It’s Mapped as a Network Drive in Windows and when I add new music (drag and drop) to it, I like to tell Sonos to Update The Music Library. This is it where Sonos fails and says the network path doesn’t exist, when it does.

The router is set to reboot weekly in the wee hours of the morning. It does not make sense to reboot the router after EACH time I drop new music into that network connected thumb drive.