Well, yes, it’s always a good idea to Google first. But that search brings up a lot of varied info.
USB mode is how your computer sees your player.
In MSC mode, the Fuze looks like two ordinary disc drives: the Fuze internal memory and the card slot. This is what I use: I just drag-and-drop or copy and paste music onto it.
In MTP mode, the Fuze is a device controlled by Windows Media Player. You can sync, do playlists, etc.
Other music software can do sync and playlists in MSC mode, but basically if you like WMP, use MTP.
