My friend received his Model X and has been letting me play with it, and there's one thing that neither of us can seem to resolve: plugging in a USB thumb drive and getting music to play. First we tried a FAT32-formatted thumb drive with M4A lossless files on it (created in iTunes on a Mac). Titles, Artists, track length, etc. plus album art would all show up with no problem, but the tracks just wouldn't play. Then we tried the same thumb drive with only MP3 files on it. We got the car to play MP3 files, but it will only play one at a time! It doesn't continue on to the next track in the folder when the previous track ends. We tried two other thumb drives, experimenting with different formatting, but the results were the same. As we all know, one can't play an iPhone via the Lightning USB cable, which is ridiculous and embarrasing. Bluetooth is the only option, and the car can't even initiate playing a track! You have to start it from the phone itself, which is even beyond stupid. Tesla really needs to get its act together with iPhone compatibility. I'm not saying it necessarily needs to incorporate Apple Car Play, Siri Eyes Free, or Android Auto, but that may not be such a bad idea! We also couldn't figure out how to mute the audio system. The manual says to "tap the scroll wheel," but that never worked for us. And we had no control over Bluetooth streaming from an iPhone 6+. Sound would play with no problem, but the car didn't automatically adjust the volume properly like most other cars do (i.e., increasing volume to max on the phone temporarily during Bluetooth, and then returning it to the previous setting after disconnecting so that the iPhone owner isn't scared out of his wits by a full-volume alert, ring, or music track.) Trying to pause the currently playing song or skipping to the next or previous track didn't work. The car just ignored us. I heard that audio functionality with the Model X was poor, but I didn't realize my 2008 Infiniti would have more robust controls than a 2016 Model X costing three times as much! I hope Tesla decides at some point to really concentrate on its audio system GUI and functionality and modernize it to be competitive with most other cars on the road.