I just burned a back-up disc to a DVD from itunes and popped it into the CD/DVD slot. I found it easier and I was left with a back-up DVD of the music.agreed, my 2010 X5d has a 12 gig hard drive. And I have loaded about 4 full albums of mp3's on there no problem. The trick is you can only upload from the USB in the glove compartment, the one in the center console is for playback only.
I found that if it is a song I purchased from the i-tunes store and have it in the Apple format, the BMW will not copy it onto the hard disk, apparently due to copy protection coding. But if you convert it into mp3 format before saving/exporting it, the BMW will copy it to the hard disk. This may not be a problem with the newer purchase from i-tunes that are not copy protected.I need to fire up my old computer, I had all my music stored on there. I rarely buy music anymore, I just listen to sat radio and that keeps me pretty happy. The previous owner left a couple of albums on the HD, unfortunately they aren't my style of music.