First, let me say this, my wife and I love our Sonos setup and have been using it for more than 5 years. I have 3 Connects, 2 Amps, a stereo pair of Play 3's, a Sonos One, all on a Boost network. I have a number of solid state and tube amps that the Connects are hooked up to. We use Alexa and Google assistants as well, and stream Spotify music, all working great.
One of the things I like best is that I can have my local music playing without a PC or my NAS powered on. My wife loves not having to mess with turning on a PC or NAS. I do this for my local music files by having them copied to a 256 gig USB drive on my modem/router USB port. The music file formats are MP3, FLAC, and ALAC. This setup has worked perfect for years now, with not only my Sonos gear playing from it, but also my other music playing software, as well as my smart Roku TV. I have had multiple different DSL modems supplied by my ISP over the years, and this setup has worked great on all of them.
The Move speaker cannot play these music files over my WiFi network without cutting out, hanging and starting again, or just stopping completely.
I spent 4 sessions on the phone with support over 2 weeks, the last one just the other day, with the nice support lady remote accessing my Win10 laptop and Sonos controller and trying everything to sort it out for well over an hour. It plays great streaming Spotify, but would not play local files properly. In the end, she said there was something wrong with the Move accessing the music files this way and couldn't resolve it at this time.
If all my Sonos gear and all my other software and hardware can play these files, I would say the Move has a bug.
So, before my 45 day trial period ran out, I had to return the speaker to Sonos. I was told I will be credited my purchase price and given a 30% discount for another future purchase.
I now have a bricked Connect that I recycled in the upgrade program.
I really liked the Move speaker for it's sound and features, and looked forward to a summer on the deck with it. In the end, this was a very frustrating experience.