I’ve got to hold the on/off button for at least 30 seconds (basically reboot) every time I want to use it. Sometimes I have to do it 3 or 4 times. It’s only 6 weeks old. Any ideas what’s wrong with it???
Well, certainly something is off. You might try manually reapplying the latest firmware, as firmware glitches can come out of nowhere–see the firmware sticky thread at the top of the forum for the download and instructions (easy to do it all). If the issue persists, contact SanDisk for a warranty replacement (or swap the unit at your retailer, if you’re still within the return period).
Good luck, and let us know how it goes!