I am myself a happy owner of a Sansa Clip 2GB, I bought one to my daughter: 2GB one, blue, w/ a 2.x series firmware onboard.
No problem with it until I applied the 2.01.31 firmware using the updated within Windows XP: now the MUSIC folder appears empty in the explorer, folder size is 0 byte, whereas device properties still say it’s nearly full (as expected). The Clip is still able to play all music… I tried manually removing the MUSIC dir and re-created it. Unplugged the Clip, database updated, all music still available. I checked there are no mp3 files in the other directories (they are all 0 byte size).
Any idea or hint?