My car has a USB connection that I use a thumb drive with to play music. I put music on it using iTunes and made Artist/Genre folders and dragged and dropped playlists. For some reason, some of the files at the beginning of the folder have strange file names that do not play when I plug the USB into the car. I have researched how to delete these files. For some reason, iTunes or the OS is making these alternate/hidden/duplicate file types that don't play. However, they don't show up when looking at the files on the drive. I read that plugging into a Windows machine will show these file types and I can delete them, but that did not work. I also tried using a program called BlueHarvest to delete these files but that did not seem to work either. Any advice appreciated. Sometimes I wish the car just had a 4G iPad in the dash! Bring us the iCar!