Sansa Fuze folder & file structure PC vs stand-alone

In my Fuze’s menu, I scroll down to the bottom and see “Folders”.  I click on over to “Internal Memory”, then click the right arrow and I see “MTP Mode” listed and underneath that,  two music folders.   I’m not sure how they got there and I dont’ really know how to get folders there.  I could simply continue to use Playlists as I don’t have a problem doing that but it seems that a lot of folks like or prefer working with Folders. Any FAQ or tutorial on this site (or elsewhere) on working with Folders and the Fuze, since this is a relatively new addition to the player?