SFFS

SFFS is the name of the filesystem stored on the Wii's NAND, and on both banks of the Wii U's NAND. It has a plaintext block of metadata (a superblock), pointing to, through FAT, encrypted (via AES) clusters of data. NPLL supports reading files from SFFS. Neither Wii-Linux, nor linux-wiiu, nor NetBSD can do so.