Review on SanDisk 16GB SD SDHC Flash Memory Card compatible with Nintendo 3DS, DS, DSi, and Wii Media Kit, Nikon SLR Coolpix Camera, Kodak Easyshare, Canon Powershot, Canon EOS | Includes Everything But Stromboli Reader by Darius Early

The description says it can be used for DS but it doesn't. I was so excited when it came in the mail, I prepared everything to get it ready and when I took it out I realized it wasn't at all what I thought it was supposed to be. If you are looking for r4, that's not it, it doesn't fit in the DS cartridge slot, it's too small, wasted $10 🙈