Just because you don't know how to do something doesn't make you an imbecile.
Some mp3 players use sub-folders to manage the songs.
Try the My Computer route again. Plug in your mp3 player and wait for it to show. Double-click on it to view the contents. If you have folders showing then yes, you have sub-folders.
-------------------- OK OK I can't go any faster! aaaaaaaaaaaagh!