about r4s for ds

one of my sd micro card isn't working it says the system files are damaged I replaced it and most of my games now i have know idea how to fix it :'( please help me (tips and advice too!!!) :D

'most of my games now' ??

Try Reformatting the SD card, this will mean that you have to connect it to the computer and all the games/ save files on it will no longer exist.

I got it fixed, I just had to replace the system files(but it comes with a price it doesn't allow me to use moonshell or have my own background but I will try to fix it with my cousin)