Firmware is the software the runs when you turn on your MP3. (Menus, Playlist, etc).
You sansa will have a disk that should load the tray app (sansaupdater.exe) that will check your current version w/ the available version and update is you wish. If the tray updater does not load on boot, you can load it as follows:
“C:\Program Files\SanDisk\Sansa Updater\sansaupdater.exe” -iloveit
Regards,
Scott.
