I ahve had my FR-S since Dec 7, 2012. I have used a variety of USB drives to listen to music as i am a Driod guy. I have used a Memorex 64gig USB drive since Christmas. The BeSpoke HU has now stopped reading it. It is a pisser as it held enough music to be able to keep lots of stuff i like to listen to on it.
The FR-S i bough had the BeSpoke HU in it and if i had to do it again, i would NOT get the unit at all. it is a PIECE OF SHIT. It sounds good and looks nice but a plain stock radio would have served me just as well.
I am going to try a few 32 gig usb sticks and see what happen with them. I can still install a 64gig card into my phone and use it that way through the Bluetooth....