Hi,

I have had the same problem, could not play music (the playlist was there, but after pressing play the "song could not be found" message) all my pictures could not be found. The camera refused to take pictures as it could not access any storage etc..

After I plugged my device on the computer running Ubuntu Linux, (mass storage modus) I could find and access de MyDocs on the device all pictures and songs where available. When I unplugged the device they where again accessible on my device too, have no idea why. Maybe you could try the same...

Good luck...