When I try to scroll down to choose songs and stuff, it sometimes won't let me scroll down and acts glitchy. I have to use lock it for a few seconds, and unlock it to temperally make it work. This happens for some reason when I use it as a backup drive on my computer. Anyways, what can I do to fix this without restoring the ipod (which even if I did do that, it will start doing it again). Ex. Some scanning program that is possible to have a scan option for ipods. Anything would be great. Thanks.