My two daughters have M3 DS Simply cards using 1 GB & 2 GB Kingston SD cards.Some of the games I have downloaded will not work,on some the blue game loading bar fills up and others even go through the games intro and language selection before a message comes which says"Could not read the data.Turn off the power and reinsert the DS Card".Any help would be appreciated but please if you are going to use new fangled language like firmware or bumping or FAT 16 remember you are talking to a crusty,old balding man in his late thirties who really didn't pay enough attention at school and has been left behind by technology.If it's not too much trouble when trying to explain things pretend you are talking to that retarded kid who lives down the street who you only see twice a year when he escapes the attic.
right now you have downloaded the latest firmware you will need to unrar it , once unrared you will have the english folder , just open the english folder and your new 2 files and 2 folders will be there.
now to put the new files and folders on your memory card , place the memory card in the card reader that came with your m3ds simply and put it in your computer ( in the usb slot ) .
now copy the new 2 files and 2 folders to your memory card , it may say something like "do you wish to overwrite files already on the memory card" , just click yes !
right thats it new firmware has been put on your memory card for the m3ds simply was that easy enough ?
just put the memory card back into the m3ds simply and put it back in your nintendo ds , switch on and enjoy playing those problem games .
any more questions just let me know , woof811.
ps. i might be easier to follow if you print this page .
got a quick question, i'm having the same issue as OP but i am using an m3 lite. will the firmware upgrade linked above work with the m3 lite or will i need to download something else?