My Sansa e260

MP3 players All other MP3 players
4

Are you able to connect in Recovery Mode? Move he HOLD switch on top of the device to ON (towards the headphone jack), hold the REC button on the side and plug into the computer, continuing to hold the REC button until it is recognized.

Then this post sholld help you with the rest:

http://forums.sandisk.com/t5/All-other-MP3-players/E280-recovery-mode-error-then-asked-to-enter-USB2-0-MSD-mode/m-p/111070/highlight/true#M9039