Regarding the media player in the car. I use an old hard drive instead of a flash drive, but it seems to work just fine. whichever port i plug into the car calls it "USB1". when I plug in a second drive (a thumb drive), the car doesn't show me the second port. the port still works fine charging my phone, but the car ignores it. is this a problem with the car's system or is it something i should have the service people look into?