Is your fuze a reburbished one? If not and it’s new, then you have a one year warranty in the U.S., two in Europe. You can contact Sandisk tech support and get a warranty replacement.
What I suggest is that you download the firmware from here. Follow the manual download instructions for your player’s version, either v1 or v2. The file comes zipped. You can unzip it and just keep a copy of the firmware file on your computer. If your player ever is able to connect to your computer, you can try reinstalling the firmware by dragging-and-dropping the .bin file into the root of the player.
If it’s a hardware problem, then that wouldn’t do anything, but with a card slot, you can load your cards with the music and audiobooks that you want by using a card reader and then just insert the card into the fuze.
