I don't take any credit for this, but I think some people here don't know about this (I didn't know about it), this is from the official yuzu discord that you can find here: https://discord.gg/u77vRWY
Source: https://github.com/MCMrARM/switch-game-card-dumper
Download: https://cdn.discordapp.com/attachments/402241866935828490/451038911737626624/swupdatedumper.nro
GBATEMP Upload: https://gbatemp.net/download/swupdatedumper-nro.34397/

1. I'm assuming you already have access to the Homebrew Launcher.
2. Put the swupdatedumper.nro in SD:\switch
3. Boot into CFW.
4. https://imgur.com/a/OLw2irt
5. Open Album (which will open up Homebrew Launcher)
6. Launch the swupdatedumper.nro
7. Dump Partition 2 (this will take while depending on how big the game is)
8. Now get the SD and navigate to SD:\dump_2
9. In that folder, you'll find all the necessary files.
10. Copy all the contents of dump_2 paste them into a directory of your choice.
11. The next part is IF the dump comes in multiple files with the extensions .nca.0x (x can be any number starting at 0), if it doesn't come in multiple files skip to "Now extract/decrypt with Hactool." part.
12. [Now you'll need to merge the .00, .01 and the .02 files.
13. make a .bat file and type in;
14. copy /b X.nca.00 + X.nca.01 + X.nca.02
15. Replace the X with the name of your .00, .01, .02 files for example;
16. copy /b 08c1d23a902a841b497f7be217c8ad6d.nca.00 + 08c1d23a902a841b497f7be217c8ad6d.nca.01 + 08c1d23a902a841b497f7be217c8ad6d.nca.02
17. the output file will be the X.nca.00 file.
18. Rename output file to X.nca. ]
19. Now extract/decrypt with Hactool.
20. run "hactool --exefsdir=output --romfs=output/game.romfs NCA"
21. NCA is the path to your X.nca
22. And now you'll have a bootable game dump!

https://pastebin.com/GszQ6zR9

Good Luck ^^
there is nothing you can do, with those dumps for now, except running some games in yuzu (with 2 fps lmao)

Normally you will get an error about invalid nca file header and this is because the nca is encrypted and you have to add a keyfile with Nintendo Switch keys.
You have to search a bit on google to find them and after you created you file you can add it to your command like this:

-k "yourkeyfile.extension"

Example:

hactool -k "keys.dat" --exefsdir=output --romfs=output/game.romfs "e0d36953372443ccd6582f4ca5d3351e.nca"

here is a sample: https://gist.github.com/nicoboss/967cd250d3969e1c4610c54e3186193b (just hashes of the keys, a little hint, you can search the hashes on google, if you find a key you should search that key in google and with some luck you should get to a big collection of keys....)
In the file are spaces and lines starting with a semicolon (';') ignored.

 

[huma_dawii]

Good to know! So I can backup the only game I have xD

 

[kingraa777]

How do i dump games for use with ryujinx ? More specificley the sonic mania from the eshop i own ?

 

[wurstpistole]

So this tool is called swupdatedumper and produces .nca files, and you say it dumps cartridges? Wouldn't that be .xci files?

 

[nero99]

How do i dump games for use with ryujinx ? More specificley the sonic mania from the eshop i own ?

You can’t. There are no public tools to dump eshop titles. Only way you can get the game is by using the cdn download app, which can get you banned.

 

[kingraa777]

Well ill pass on that then haha

 

[Deleted User]

I get "Invalid NCA header!".

The game I'm trying to extract is Super Bomberman R.

 

[SirNapkin1334]

It says, "boot into CFW" - is CFW needed or can we do it right now by booting into HBL via other means?

 

[Ursula]

Is there a way to dump in .xci format, i wanna extract cert for inject in to roms with the tool XCI explorer

 

[Gnarmagon]

I get "Invalid NCA header!".

The game I'm trying to extract is Super Bomberman R.

you are missing the "keys"

you have to create a file with some keys inside (dunno which of them but there is a certain romsite with a lot of keys....)

you can add the file with

-k "yourkeyfile.extension"

here is a sample: https://gist.github.com/nicoboss/967cd250d3969e1c4610c54e3186193b
(spaces are ignored and lines starting with a semicolon (';')

 

[MadonnaProject]

These backups can't yet be played right?

 

[Gnarmagon]

These backups can't yet be played right?

yep sherlock,
you can't play them correctly without crashes until aprox. 2 years (it takes some time after atmosphere is released to fix bugs and get everything running stable, best example is luma3ds which crashed tons of times for me in the past while I was playin new super mario bros 2)

Edit: you did read my post ?

there is nothing you can do, with those dumps for now, except running some games in yuzu (with 2 fps lmao)

 

[MadonnaProject]

yep sherlock,
you can't play them correctly without crashes until aprox. 2 years (it takes some time after atmosphere is released to fix bugs and get everything running stable, best example is luma3ds which crashed tons of times for me in the past while I was playin new super mario bros 2)

Edit: you did read my post ?

No, I skimmed the post. It was a harmless question. Also, "sherlock"? what's with the name calling? The beta male passive-aggression is really not attractive mate. Calm down, have a soy tea.

Anyways, the only reason I am responding to your post is because I think backup loading on the switch will be far sooner than 2 years.

 

[Deleted User]

you are missing the "keys"

you have to create a file with some keys inside (dunno which of them but there is a certain romsite with a lot of keys....)

you can add the file with

here is a sample: https://gist.github.com/nicoboss/967cd250d3969e1c4610c54e3186193b
(spaces are ignored and lines starting with a semicolon (';')

Thank you.

 

[Gnarmagon]

No, I skimmed the post. It was a harmless question. Also, "sherlock"? what's with the name calling? The beta male passive-aggression is really not attractive mate. Calm down, have a soy tea.

Anyways, the only reason I am responding to your post is because I think backup loading on the switch will be far sooner than 2 years.

I didn't meant sherlock as an insult, was just a bit annoyed that you didn't read before posting :d

 

[MadonnaProject]

I didn't meant sherlock as an insult, was just a bit annoyed that you didn't read before posting :d

LOL, no hard feelings then.

 

[Dan-the-Rebirth]

What's the difference between a nca dump and a xci dump?

 

[Gnarmagon]

What's the difference between a nca dump and a xci dump?

https://gbatemp.net/threads/nca-and-xci.503269/

 

[Zumoly]

Now that is interesting!
If yuzu can run backups, it might be worth checking how it does that so that we can replicate it using a homebrew.

 

[Draxzelex]

It says, "boot into CFW" - is CFW needed or can we do it right now by booting into HBL via other means?

Yes, you can use Pegaswitch which now has support up to 4.1.