This page describes the format of savegames contained in NAND. NAND savegames do not use an container with the entire file encrypted. A lot of the saveimage appears to have uninitialized data, resulting in a lot of encrypted data in the saveimage.
| Image offset
|
Length
|
Description
|
| 0x00
|
0x10
|
AES-CMAC
|
| 0x10
|
0xF0
|
Zero padding
|
DISF
- This is located @ 0x100 in the image, following the CMAC header.
| Start
|
Length
|
Description
|
| 0x000
|
4
|
Magic ("DISF")
|
| 0x004
|
4
|
Magic Number (0x40000)
|
| 0x008
|
32
|
Hash
|
| 0x028
|
8
|
Primary Partition Table Offset
|
| 0x030
|
8
|
Primary Partition Table Size
|
| 0x038
|
8
|
Secondary Partition Table Offset
|
| 0x040
|
8
|
Secondary Partition Table Size
|
| 0x048
|
8
|
Save Partition Offset
|
| 0x050
|
8
|
Save Partition Size
|
| 0x258
|
|
End
|
DPFS
- This is located @ 0x200 in the image, following DISF.
- Block sizes are log2
| Start
|
Length
|
Description
|
| 0x00
|
4
|
Magic ("DPFS")
|
| 0x04
|
4
|
Magic Number (0x10000)
|
| 0x08
|
8
|
Offset 0
|
| 0x10
|
8
|
Size 0
|
| 0x18
|
8
|
Block Size 0
|
| 0x20
|
8
|
Offset 1
|
| 0x28
|
8
|
Size 1
|
| 0x30
|
8
|
Block Size 1
|
| 0x38
|
8
|
Offset 2
|
| 0x40
|
8
|
Size 2
|
| 0x48
|
8
|
Block Size 2
|
IVFC
- Generally follows DPFS, similar to 3DS.
| Start
|
Length
|
Description
|
| 0x00
|
4
|
Magic ("IVFC")
|
| 0x04
|
4
|
Magic Number (0x20000)
|
| 0x08
|
8
|
Master hash size?
|
| 0x10
|
8
|
Level 1 offset
|
| 0x18
|
8
|
Level 1 size
|
| 0x20
|
4
|
Level 1 block size, in log2
|
| 0x24
|
4
|
Reserved
|
| 0x28
|
8
|
Level 2 offset
|
| 0x30
|
8
|
Level 2 size
|
| 0x38
|
4
|
Level 2 block size, in log2.
|
| 0x3C
|
4
|
Reserved
|
| 0x40
|
8
|
Level 3 offset
|
| 0x48
|
8
|
Level 3 size
|
| 0x50
|
4
|
Level 3 block size, in log2.
|
| 0x54
|
4
|
Reserved
|
| 0x58
|
8
|
Level 4 offset
|
| 0x60
|
8
|
Level 4 size
|
| 0x68
|
4
|
Level 4 block size, in log2.
|
| 0x6C
|
4
|
Reserved
|
| 0x70
|
48
|
Unknown, reserved?
|
| 0xA0
|
32
|
Hash
|
JNGL
| Start
|
Length
|
Description
|
| 0x00
|
4
|
Magic ("JNGL")
|
| 0x04
|
4
|
Magic Number (0x10000)
|
| 0x08
|
8
|
Savedata Size
|
| 0x10
|
8
|
Unknown, Size
|
| 0x18
|
8
|
Savedata Blocksize?
|
| 0x20
|
4
|
Unknown
|
| 0x24
|
4
|
Unknown
|
| 0x28
|
8
|
Unknown
|
| 0x30
|
464
|
Padding?
|
SAVE
- Generally follows JNGL, structure is different from 3DS.
| Start
|
Length
|
Description
|
| 0x00
|
4
|
Magic ("SAVE")
|
| 0x04
|
4
|
Magic Number (0x60000)
|
| 0x08
|
8
|
Unknown, number
|
| 0x10
|
8
|
Unknown, block size
|
| 0x18
|
8
|
Unknown, block size
|
| 0x20
|
8
|
Unknown
|
RMAP
- There are generally two RMAP blocks in sequence.
| Start
|
Length
|
Description
|
| 0x00
|
4
|
Magic ("RMAP")
|
| 0x04
|
4
|
Magic Number (0x10000)
|
Files
- The root file/folder index is generally 2
File/Folder Table Entry
| Start
|
Length
|
Description
|
| 0x00
|
4
|
Parent Folder Index
|
| 0x04
|
64
|
Filename
|
| 0x44
|
4
|
File/Folder Index?
|
| 0x48
|
4
|
File offset index in offset table, 0 for folders
|
| 0x4c
|
8
|
File size, or number of files for folders
|
| 0x54
|
8
|
Unknown
|
| 0x5c
|
4
|
Next File Index, same as folder index for folders
|