Ive been looking around on this forum for ages, but Ive only just taken the initiative to register. I just got a new M3DS rumble pack, which came with a 4GB miniSD card. Pretty standard. I have an original DS, as it came out first (pre ordered before they were out ^^) My friend helped me out, he ordered the rumble pack for me and put on some games,and I got it a few days ago. as I put the stuff (sorry about my great technical language ) into the DS slot, it didnt work, it just said there was nothing in the DS slot, but, I took the SD card out and blew on it and did the same to the M3DS card, and after a couple of goes, it worked fine. I decided a couple of days ago that I wanted to put a few more games on, so, as I had the space, I got the files for a couple of final fantasy games, and successfully put them onto the SD card, no problems. But now, when I put the M3DS into my DS with the SD card inside, It still says it has no DS card inside it, and I have blown on it and done anything I can think of to sort it out, but it just isnt working. I think it must be the M3DS, because my computer reads the mini SD. What checks can I do on the M3DS to fix it/check if it was broken? I dont particularly want to buy another one. Please help tl;dr, my m3ds card isnt being picked up, after previously working, what can I do to fix it?