Does it matter which setting it is on?!?
DId you read the link?
MTP if you want to use Windows Media Player to organize, playlist and sync your music. You also need MTP for files with digital rights mangement–like library audiobooks–so that MTP can send over the secret codes.
MSC if you want the Fuze to work like basic storage and don’t want Windows Media Player doing things automatically. I use MSC…
Your computer can only see files transferred via one mode at a time–if you sent files via MTP then your computer won’t see them if the Mode is MSC. The Fuze itself doesn’t care how files got there, but in order to see everything on the Fuze from your computer, it’s best to choose one mode and keep it.