The USB SD card reader that comes with the R4i cards, stopped working. I use it for my DSi and I also use it for my EZ Flash Cart 4 on my GBA. Well, it stopped working. I am guessing they are just cheap readers homemade in China or something. I was trying to put a game on the SD Card for the EZ Flash IV using the T-Flash that came with the R4i card. It was working for 2 minutes. Then it stopped working. It reads it for the first few seconds, Windows detects it, then it just disconnects. I tried taking it a part and cleaning it, same stuff. My computer is reading other USBs fine. I don't think it is the Micro SD Card that is causing the issues because the system reads the SD card fine and plays the game. had this issue before. Luckily, I had an extra MicroSD card reader from another R4i card I had. Anyway.... What is a good replacement for my broken readers?