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.

mig switch not working/updating??

stickybit · 2024-03-28T19:59:51+00:00

just got my mig switch and followed instructions to the T to update it and all im getting is a red light and then a message saying cart not recognised, all im trying to do is update it to the latest firmware, it says it should flash blue when...

How do I recover saves from Nintendo file format?

Rayek

Member

Newcomer

Level 2

Jul 26, 2021

Hello everyone.

So it seems, I managed to get my emuNAND partition corrupted when updating my emuNAND firmware. When I try to launch it, I get

Code:

unknown pkg1 version hos version not supported!
or emummc corrupt!

I tried various solutions I found here and online but to no avail.
However, I did manage to mount the USER Partition in NxNandManager in Windows and would now like to backup my save data so I can do a clean format of the SD-card and start from scratch.

So how can I do this? I assume, the save information is stored in /save/ and /saveMeta/ but How can I recognize which game e.g. 000000000000000b refers to?

Also are there any tools that can read these files and convert them to the file format used by Checkpoint or EdiZon?

I had a look into Hactool and tried to use the keys I got with biskeydump but am not sure how to proceed. When I do something like this:

Code:

hactool.exe -k keys.txt -x 0000000000000002

I get

Code:

[WARN] prod.keys does not exist.
[WARN]: Failed to match key "hwi", (value "*key*")
[WARN]: Failed to match key "sbk", (value "*key*")
Invalid NCA header! Are keys correct?
Done!

Any help is greatly appreciated.

Okay I think I figured a way. For anyone in the future experiencing a similar problem, you can use hactoolnet.

This allows you to extract the save data. Then you can backup a new save of each game that you want to restore and compare the save file format in order to find out, which save belongs to which game.

Last edited by Rayek, Jul 26, 2021

Homebrew How do I recover saves from Nintendo file format?

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