Depends on your current situation. Hopefully you have figured out that you have to convert your micro SD to a full one. But, like FEF1 said, You will have to specify what exactly you are trying to do. If you are using USB Loader GX with homebrew, you will have to make a separate directory on your sd card. As an example, D:/Games. if VC/WiiWare then you will chose the install directory on the Wii Shop Channel. But last year on the 31st of January, the Wii Shop Channel shut down. So if possible can you reply and tell me your problem?