This application allows you to extract/install savegames on your Wii. (data.bin files not supported). It allows savegames to be copied from the Wii to an SD card, including savegames that cannot normally be copied from the system menu. It is a modification of the Savegame Manager from Waninkoko.

This homebrew makes permanent changes to your Wii’s flash memory (NAND) and should be used with caution.

http://wiibrew.org/wiki/SaveGame_Manager_GX