Flash Filesystem

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The Nintendo 3DS has a 1GB NAND Flash chip.


The format of the Nintendo 3DS's flash filesystem is currently undocumented. Reading of the flash chip is possible through pinouts on the motherboard and has been performed successfully but the data is encrypted and can't be understood without first decrypting it.

File System

Each NAND partition is formatted by a FAT file system.


The NAND file system appears to be encrypted using AES.


Name Description
firm0 Firmware partition.
firm1 Firmware partition.
nand CTR-NAND File System. (3DS)
twln TWL-NAND File System. (DSi)

CTR partition