I am using a 60 GB SanDisk Cruzer Glide stick containing 40 GB of music in my router as a NAS. Sonos gives the error “unable to play (song name), unable to connect to RT-AX92U (my router)” when
play or shuffle is clicked. This eliminates a random half of my saved songs. If I use finder to locate a song, I can play anything. If I choose only one song at a time, all can be played. This appears to be a problem with the building of the “all songs” queue.