ROM Hack Question How extract files from files stored in mSD?

[cucholix]

I want to extract game files using the contents in my mSD, and use them to make mods in layeredFS.

eShop games are stored in

mSD:/Nintendo/Registered/Contents/

It’s easy to dump game cards into nca, then convert them to layeredFS but no ides what’s the process for digital only games.

 

[Wika]

You can use Nxdumptool to dump the eshop game as a nsp file, or ExeFS/RomFS file with options.

Note: You'll probably need keys: sdmc:/switch/prod.keys

 

[cucholix]

You can use Nxdumptool to dump the eshop game as a nsp file, or ExeFS/RomFS file with options.

Note: You'll probably need keys: sdmc:/switch/prod.keys

I have gcdumptool which say “nxdumptool” by DarkMatterCore, but AFAIK it only dumps game cards.

 

[Wika]

I don't know if they're the same or not, but if you have version 1.1.3 installed from the homebrew store, it works for me.

 

[cucholix]

I don't know if they're the same or not, but if you have version 1.1.3 installed from the homebrew store, it works for me.

Ok, I have it, now it says: error: unable to open “sdmc:/switch/prod.keys” to retrieve “eticket_rsa_kek”, titlekeks and KAEKs!

 

[Wika]

Ok, I have it, now it says: error: unable to open “sdmc:/switch/prod.keys” to retrieve “eticket_rsa_kek”, titlekeks and KAEKs!

I'm assuming you have switch keys on your pc for making mods correct? You need to put them: sdmc:/switch/prod.keys

 

[cucholix]

I'm assuming you have switch keys on your pc for making mods correct? You need to put them: sdmc:/switch/prod.keys

Yeah, but they are in txt format...

 

[Wika]

Yeah, but they are in txt format...

it's not a special format or anything you can just rename keys.txt to prod.keys

 

[nowpearl]

@Wika
I did not know this option friend, thank you very much.
he already extracts with the game updates to use mod layeredFS:

 

[cucholix]

It’s weird that only gcdumptool get listed when searching nxdumptool in HBAS, I always thought gcdumptool was the more advanced version, but it’s not the case.