You don’t say whether you’ve tried both USB modes. Have you?
If the Fuze isn’t seeing files on its own, unconnected from the computer, then something is messed up.Scroll all the way down Music, past the first page, and look at Folders. That’s navigating by folders–Artist, Album, etc. are all lists from the tags. Your files may have tags the Fuze doesn’t like, so it’s showing them as empty (or Unknown). Folders sees the folders themselves. See if you can find your stuff that way.
And if you can’t, I’d suggest a format: Settings/System Settings/Format. That erases all content added by the user–leaving the firmware intact–but it seems like your content is already gone anyway.
Then put it in MTP mode and try a NetLibrary transfer.
And if you’re still having problems, do a firmware update from this thread. Don’t bother with the Updater, since there aren’t likely to be any more updates. The link that says All Regions is the zipped firmware itself–just unzip it and drop fuzeA.bin onto the internal memory’s driveletter.
