Nintendo ds Ive been using a Sandisk microcard 2GB and then I bought a Transcend microcard 4GB. I tried to copy the folders from the Sandisk to the Transcend but it didnt work. How to make it work

you need 2 SD readers, and 2 USB ports in your pc

open both of them up, and then copy the files from your old one to your new one, or one SD reader, and copy the files to you desktop, then pull out the SD card, than put the other one in, then drag the files of the desktop into the SD card