I bought an extra hard drive to transfer more music but i keep getting error messages when trying to use it. It wont recognize the new hard drive. I have reinstalled the mm driver software numerous times but with no luck. Is there anybody that has had this problem and does alpine make a bigger hardrive for this head unit than 16gb? This unit is now out of production I assume because of the i pod. I really want to keep this unit but want more songs loaded on it.