My music library is on a USB flash drive plugged into my TP-Link router. Speaker system comprises two pairs of Ones and one pair of Era 300s.
I cannot play anything from the music library on just the Eras. Music library plays fine on both of the One pairs. I can get the Eras to play from the library only if I’m already listening on the Ones and then group in the Eras.
All external streaming services and Airplay from my phone work absolutely fine on the Eras & they sound perfect.
When I try to play direct from the music library to the Eras, the Sonos app says “Content is unavailable”.
I’ve done a factory reset on the Eras and this hasn’t helped. I’m hoping you can though!