Hello guys, this is my first post here! I just got a MIG Switch card out of curiosity and I was tinkering with it. For those who don't know, it's used by placing XCI dumps as well as other game specific bin files in the sd card of the MIG Switch, and are obtained from the original cartridge by using an app like nxdumptool. Two of these bin files are mandatory to get the game to boot: Initial Data.bin and Certificate.bin. They stay the same for every cartridge of a specific game. Now, if you want to use an XCI dump from a shady website it's impossible to get it to work without those files. By using the Certificate.bin from another game it has no problem, but this does not count for the Initial Data.bin. So I looked for a way to obtain this Initial Data from an XCI file and read a bit of the XCI file documentation from switchbrew dot org. Here's what I understood so far: The Switch checks if the cartridge is valid by doing a challenge–response authentication on the Initial Data. The Package ID is contained both on the XCI and the Initial Data, on positions 0x110 and 0x0 respectively. The Initial Data hash is on the XCI at position 0x160. It is calculated by doing a SHA-256 hash on the full Initial Data content. So I was wondering, is there a way to to construct a functional Initial Data file starting from an XCI dump? I also tried a reverse approach by editing the Package ID in the Initial Data from another game, generating the Initial Data hash and putting it in the XCI file but is not enough to get the Switch believe it's a real game. Sorry if this may seem stupid but let me know what you think.

duckstation for Switch

catlover007 · 2024-04-22T04:06:40+00:00

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Homebrew Question can i transfer the save file of a game in the emunand to a clean switch?

Thread starter darkap7
Start date Jun 22, 2021
Views 1,941
Replies 2

darkap7

New Member

Newbie

Level 1

Jun 22, 2021

can i transfer the save file of a game in the emunand to a clean switch?

i have 2 switchs, 1 with a save file in the emunand that i would like to pass to another switch that its clean.

eyeliner

Has an itch needing to be scratched.

Member

Level 16

Jun 23, 2021

Is the second unit exploitable?
You might be able to pull it off by using hacdiskmount, but there's the chance of brickage.

Or just use Checkpoint, as some people around here use it to that same purpose.

thesjaakspoiler

Well-Known Member

Member

Level 8

Jun 24, 2021

As mentioned by 'eyeliner' the only way to keep your second Switch clean is to do it with hacdiskmount.
Basically it's creating a dump of the NAND, mounting that with a PC, add the save files and flash back the NAND again.
A lot of risk involved if you don't know what you exactly need to do.
The save files can indeed be retrieved with CheckPoint from the first Switch.
But since CheckPoint only runs on a CFW, you can't use it to copy your save files to the clean Switch.