Before the annoyance (or maybe impossibility) of backing up and reloading, I’d try a firmware reload. It may be that something in the firmware got glitched.
Download the firmware from here:
http://forums.sandisk.com/t5/Fuze/Sansa-Fuze-Firmware-Update-01-02-31-amp-02-03-33/td-p/139175
Download from the All Regions link. If you don’t know whether your unit is 1.x or 2.x, download both.
Unzip the file you’ve downloaded. Connect the Fuze and drag FuzeA.bin onto the driveletter your computer gives the Fuze. Try both version 1 and version 2 if need be–the unit will only load the one it can use.
