Sansa Fuze - some music files suddenly disappeared on player

Yesterday, I turned on my Sansa Fuze and about 100 music files of the 300 or so that were on the player disappeared.  Some albums are completely gone while other albums are missing several songs.  They are not seen on the player, Media Player, or explorer.  Any thoughts on what may have happened?

I don’t know what’s going on, but considering that the Fuze is capable of deleting music files on the fly, I’m leaning towards your Fuze going on the fritz.