I used the USB port in the dash compartment....plugged it in, selected Music, External, and pressed the Option switch (next to the dial)....and selected Import. It took a minute or two before it "read"...I actually thought it wasn't working but gave it a minute or so and it started to download. It took mine a little over an hour for 4k songs. As mentioned though, it also downloaded (I'm assuming games/movies) which may have taken longer.....that's why I think the USB stick may be a better idea although in my case, I don't have a way to do that.
Good luck and as I posted earlier, builds after 9/2010 don't need any additional cables, interfaces, etc.
Last edited by Fleetman; 01-26-2013 at 10:25 AM.