Last Christmas I loaded a bunch of Christmas music onto a flash drive so I could listen to them for the holiday season. Did the same in our Jeep too.
i just love the first gen radio that had the hard drive in the 2009. stick a cd in copy it to the hard drive and your done. I must have over 30 albums stored on that drive. and only have used half of it. I use the USB port on it for charging phone.