Can anybody shed some insight regarding why this happens: I have several MP3 tracks on several different USB Flash drives. The X910BT will play each USB Flash drive and each track fine and the sound quality is excellent. But it seems that after playing 10 or 15 tracks, it plays only about half of the next track, then will play about the next 10 or 15 tracks OK, then only about half of the next track, etc. Why does it play most of the tracks OK but only half of some tracks? I read the manual and it says that (in so many words) the X910BT may not be compatible with all types of USB Flash drives. Can anyone tell me which brands of USB Flash drives the X910BT IS compatible with? Thanks.