Hacking R4iTT Purple (NEW Sticker) - Problem about adding games

[gridatttack]

So I bought a new r4iTT purple, and there is something odd I found in it.
When I use the sd to usb adapter that it came with, I open the folder in the computer, but the only files that are shown are the firmware.nds, and some system files.
The card came preloaded with 65 (crappy) games, and I want to add/delete them.
So are the files hidden in purpopse, or is some setting on the SD?

Thanks in advance.