This thread is outdated
A lot of information in this thread is heavilly out of date.
If you have time, and have Staff permission, feel free to edit this thread and remove this statement once necessary.

Some information that needs to be addressed:

• SX OS and Atmosphere now supports proper LayeredFS, instructions for using it has changed since this tutorial was made
• Supported Firmware information is out of date
• LFSKit needs to be updated to properly support non 5.x.x firmware
• Compatability chart needs to be re-made

-PRAGMA

WARNING

• DO NOT GO ONLINE WHEN DOING THIS (YOU WILL BE BANNED)

How to use LayeredFS for Backup Loading

Firmware Supported: ONLY 5.x.x
Use the PRAGMA LFS Kit below.

PRAGMA's LFS Kit

DOWNLOAD
SOURCE

• Go from NOTHING in your SD Card to playing a game backup in a few clicks!
• Decrypt .XCI -> romfs/exefs folder with main.nmpd auto edited aswell as folder's name auto renamed to donor titleid
• Download NOTHING except LFSKit!

ENJOY!

Picking a Donor Title and getting Donor TitleIDRunning Game Backups!

1. 
   
   1. A donor title is the application we will run to open the backup.
      Pick a game you don't care about (Download a Demo or a free game from eShop, for example Octopath Demo)
      saves are something no one knows much about, we don't fully know where or how they are stored.
      They might overwrite the donor titles save, so seriously pick a game you DONT care about, not a game you rarely play.
      
      
   2. I also recommend picking a donor title/game combo that has been tested and reported working just so you know if YOU did something wrong or not.
   3. Find the TitleID of the donor title you chose from http://nswdb.com or http://switchbrew.org/index.php?title=Title_list/Games
      Region must be the same, choose the TitleID for the base-game NOT for the update title, even if your updated.
2. 
   
   1. Once again, boot into Hekate-IPL (Step 1).
   2. Enter "Launch firmware" and select "RomFS".
   3. Your now in your system's home menu.
   4. Open the Donor Title you set the TitleID of on that folder and .npmd file earlier.
   5. The game will load up flawlessly.
      If you opened the Title lets say, Fortnite, and Fortnite booted, the titleid of the folder in sd:/atmosphere/titles/{fortnitetitleid} doesnt exist, or doesnt start with 0100.
      If it gives you an error screen, either you didnt edit the main.npmd properly, or its an incompatible title/donor combo.
   To see which games work and which dont using which donor titles, look below.
   If you notice that you used a combination of Game and Donor title that isnt in the list below, post in the thread and I will add it. (look under to see what I need to add to chart).
   

Troubleshooting

• Black Screen/Infinitely Loading
  Leave it for around 5 minutes then press the home button and go back into the game without closing it. Often this can do the job.
• Freeze when Loading
  Close the game and try again, its a common occurence, you may have to try up to 4-5 times before getting it to work, sometimes you may even have to reboot between retries.

 

[SonicRegret]

Cave Story (Game) over VOEZ Demo (Donor) works great and saves.

Proof:

 

[MitsukiUchiwa]

Mario Odyssey doesn't work on Namco Museum / 5.1.0 / black screen after "licensed by nintendo" + nintendo switch logo
ARMS does work on Namco Museum / 5.1.0 / haven't tried to load my save

 

[Traiver]

Now a big injection: Monster Hunter Double Cross (XX) injected in Skyrim (Nintendo switch loading screen won't fade but it runs fine)

Edit: The Nintendo Switch logo will fade after pressing the Home Menu button and go back into the game.

 

[Favna]

Game Name: Donkey Kong Tropical Freeze
Donor Name: Wonder Boy: The Dragon's Trap (0100A6300150C000)
Status: Works
Firmware: 5.1.0
Saves: Yes (in video you can see I'm at level 2, have completed level 1 and quit since)
Proof: https://streamable.com/r5azv

--------------------

Game Name: Xenoblade 2
Donor Name: Wonder Boy: The Dragon's Trap (0100A6300150C000) and RAYMAN® LEGENDS: DEFINITIVE EDITION DEMO (0100974004924000)
Status: Black screen, doesn't work
Firmware: 5.1.0
Saves: N.A.
Proof: https://streamable.com/yu915

 

[Zumoly]

Guys I'm not far off.
Got the xci file to extract but I'm getting three folders 'normal' 'secure' 'update'.
Wher to get the 'romfs' file?

 

[Favna]

Guys I'm not far off.
Got the xci file to extract but I'm getting three folders 'normal' 'secure' 'update'.
Wher to get the 'romfs' file?

You extract it from the largest .nca file in the 'secure' folder. You also need the exefs folder from there.

 

[Traiver]

Oh and saving works on Monster Hunter Double Cross, too.

 

[VIDOKS]

Guys I'm not far off.
Got the xci file to extract but I'm getting three folders 'normal' 'secure' 'update'.
Wher to get the 'romfs' file?

try this script work fine if you have the key.ini :
hactool.exe -k keys.ini -txci --securedir="xciDecrypted" "%~1"
dir "xciDecrypted" /b /o-s > nca_name.txt
set /P nca_file= < nca_name.txt
del nca_name.txt
hactool.exe -k keys.ini --exefsdir="exefs" --romfs="xciDecrypted\romfs.bin" "xciDecrypted\%nca_file%"
del "xciDecrypted\*.nca"
del "xciDecrypted\*.tik"
del "xciDecrypted\*.cert"
pause >nul

 

[Favna]

try this script work fine if you have the key.ini :
hactool.exe -k keys.ini -txci --securedir="xciDecrypted" "%~1"
dir "xciDecrypted" /b /o-s > nca_name.txt
set /P nca_file= < nca_name.txt
del nca_name.txt
hactool.exe -k keys.ini --exefsdir="exefs" --romfs="xciDecrypted\romfs.bin" "xciDecrypted\%nca_file%"
del "xciDecrypted\*.nca"
del "xciDecrypted\*.tik"
del "xciDecrypted\*.cert"
pause >nul

So without a script that comes down to the following. Don't make it more complicated than it needs to be. Especially the whole moving things around and the nca_name.txt stuff.

hactool -k {PATH_TO_KEYS.TXT_OR_KEYS.INI} --exefsdir="exefs" --romfs="romfs.bin" {PATH_TO_.nca_FILE}

 

[VIDOKS]

try this script work fine if you have the key.ini :
hactool.exe -k keys.ini -txci --securedir="xciDecrypted" "%~1"
dir "xciDecrypted" /b /o-s > nca_name.txt
set /P nca_file= < nca_name.txt
del nca_name.txt
hactool.exe -k keys.ini --exefsdir="exefs" --romfs="xciDecrypted\romfs.bin" "xciDecrypted\%nca_file%"
del "xciDecrypted\*.nca"
del "xciDecrypted\*.tik"
del "xciDecrypted\*.cert"
pause >nul

And for the patch for the npdm file try this website work fine for me http://carlus.altervista.org/nx/title_id_patcher.html?title-id=010025400AECE000&npdm=main.npdm

 

[adam1290]

Mario Kart 8 loading over Puyo Puyo not working, Nintendo loading screen then black screen.

 

[Deleted member 373223]

Mario Kart 8 loading over Puyo Puyo not working, Nintendo loading screen then black screen.

Try with other games. Fortnite? Pokèmon quest?

 

[KeyZiro]

Dragon Quest Builders works with Kitten Squad as donor.
Saves works
Crashes when you try to reboot the game

 

[ProNiteBite]

Game: Hyrule Warriors (Definitive Edition)
Donor: Super Mario Odyssey
Firmware: 5.1.0
Saves: Working
Proof: N/A
Notes: Everything is working on Hyrule Warriors. When it initially launches it has black bars on the top and bottom due to the switch loading still being present, but going to the home menu and then back to game fixes the issue. Saving works perfectly. I have tried closing the software as well as resetting the console and it everything is still saved and works perfectly fine. After exiting the game, running another game, and reopening, the console may crash.

 

[Zumoly]

So without a script that comes down to the following. Don't make it more complicated than it needs to be. Especially the whole moving things around and the nca_name.txt stuff.

hactool -k {PATH_TO_KEYS.TXT_OR_KEYS.INI} --exefsdir="exefs" --romfs="romfs.bin" {PATH_TO_.nca_FILE}

Hi!
Actually got the romfs file witht he hactool gui app.
How to get the exefs now?

 

[VIDOKS]

After some test overcooked work with fortnite as donor proof

 

[runetoonxx2]

has anyone tried putting anything over breath of the wild?

 

[Kyousak]

Super Bomberman R works using Fallout Shelter as Donor on 5.1.0
Proof is here ( https://streamable.com/zp3r3 )

 

[Favna]

Hi!
Actually got the romfs file witht he hactool gui app.
How to get the exefs now?

Just remove the --romfs="romfs.bin" part from that command

 

[XorTroll]

Game: Nintendo Labo ToyCon 2 - Robot kit
Donor: Rocket League
Firmware: 5.1.0
Saves: No idea
Proof (video):



Notes: No idea about saves, it sometimes fails and throws an error when rebooting.