I have a new to me 2009 Z4. When I put USB memory stick in the counsel port, it recognizes the music and plays the music I have on the stick (2 songs) on fat partitions. However when I go to back-up the music from the hard drive to the USB I get to the OK screen and then nothing happens other than it puts me back to the beginning of the back-menu. If I had another memory dongle I would try that, but I do not. Being that it recognizes the songs on the dongle I suspect it’s partitioned properly, so any suggestions? 
