| + | Most of the System Format is done with [[FS:InitializeCtrFileSystem]]. This command updates the high u64 of the keyY stored in [[Nand/private/movable.sed|movable.sed]]. Since this keyY was updated, the data stored on [[SD_Filesystem|SD]] card(sdmc/Nintendo 3DS/<ID0>/<ID1>) and the data under [[Flash_Filesystem|nand/data/<ID0>]] is rendered useless, since that data used the old keyY. Since that data is no longer usable, the system then deletes the two above SD/NAND directories. |