Search for "ModMii Classic" by XFlak. Look for the "NAND Builder" or "EmuNAND" feature.
Here is the harsh reality:
Before you click that "Download" button, understand the real-world consequences: Free Wii Nand Download
Downloading a "Free Wii NAND" typically refers to two distinct things: obtaining a backup of the Wii's internal memory (NAND) for use in an emulator like Dolphin or finding tools to dump your own console's unique data. It is important to note that downloading another person's NAND is generally considered and unsafe. Search for "ModMii Classic" by XFlak
Have you successfully dumped your own Wii NAND? Share your experiences in the homebrew forums. And always, always keep your keys.bin file secret – it is the digital key to your console’s identity. It is important to note that downloading another
Homebrew apps like USB Loader GX and emuNAND allow you to run a virtual copy of the Wii’s system menu from your SD card or USB drive. This is great for launching WiiWare and VC games without eating up internal memory. Many users seek a pre-built, blank NAND to use as their "EmuNAND."