R4 for 3DS Programming

I need someone to load ROMS onto a r4 chip for 3DS so I can play Pokémon. I tried doing it myself but couldn't do it and somehow put “undeletable” files on my micro SD card(that goes into the r4 and the r4 goes into the DS). The files on the R4’s SD card came with files for a menu(Home Screen) and what not but now cannot be deleted from the sd card. The Pokémon ROMS are online as well as the menu software for the R4. I tried formatting the card but cannot because of the “undeletable” files.