Please Help.

My problem is with my sd card. I just bought a m3 ds real complete with the rumble pak and gba extension, and I just bought a 2gb sandisk sd card. When I try to put any files on the sd card it doesnt work. It will copy half of the file and then stop and say I/O device error. I thought it was the SD card, so i bought another brand, still the same problem. I tried to format both from FAT to FAT32. But everytime after the format is complete it will say "Windows can not Format." I also even used my other computer and tried all of the following and consistent exact same problems.I don't know if it is a problem with my computer or my card reader. If i am doing something wrong, or if i have to download something, but if anyone could give me any suggestions so i could start using my m3 that would be amazing.Thanks

Yeah it would have been your MicroSD was probably faulty, however since you bought another one, tried using a different reader, or a adapter?

Gah... any suggestions on any readers? How much are readers usually...? And Sd cards work with every computer right...?I do have XP.

USB yes. I was meaning if you're using a MicroSD reader for a MicroSD, use a SD adapter if you've got one, or use those multi card readers. If you can't get access to any others, say so.