Ok, so i'm playing mp3's in my car from USB stick. Works great and with 8GB on it i was able to load lot's of songs. Now here is the small thing which annoys **** out of me. When picking the phone (over BT) USB of course stops playing (as it should) and after conversation is done system switches back to USB and continues to play the song. However i''m using it all the time in RDM ALL mode and after switching back from phone conversation system drops the RDM ALL settings all the time. I have to press it again. It happens all the time when there is interference with BT...do you have the same problem? I guess it is the way how Hyundai programmed head unit, but maybe someone knows how to force system to memorize RDM settings...?