Nice, I'm looking for Donkey Kong Country: Tropical Freeze save but it appears to be very hard to find one right now.
I'm going to post the tutorial about how enter the USB Recovery Mode (RCM), run the CFW, load the homebrew and run the Checkpoint app to extract the save file
If you know about how enter RCM and homebrew so you can skip to 13, also you need Checkpoint.nro to access to Checkpoint.
1) You need SD card (any size), USB Type C cable and jig or paperclip
2) Download Checkpoint -
https://github.com/BernardoGiordano/Checkpoint/releases
3) Download CFW folder from
Hekate-SDFilesV3.zip
4) Download Payload from there -
https://gbatemp.net/threads/hekate-with-fixed-sleep-mode.506254/
5) Copy all folders from Hekate-SDFilesV3.zip to your SD card
6) Copy
Checkpoint.nro to switch folder in your SD card so put in your Switch
7) Download TegraRcmSmash from
https://switchtools.sshnuke.net/
8) Put Switch in USB Recovery Mode, known as RCM by use paperclip or jig on right rail and hold the volume + and power at same time, so your Switch will be in black screen
9) You have to follow their instruction to install the APX driver by run zadig (you can get one from
https://zadig.akeo.ie/), look for APX and find libusbK (v3.0.7.0) to install the driver.
10) Drag the payload to TegraRcmSmash
11) Look at Switch screen and find CFW to run
12) Go to Album so wait for Homebrew to load
13) Run the Checkpoint
14) Select the game of your choice
15) Follow onscreen instruction to extract the save file by click on Backup and input the name of your choice *For example, Pika*
16) Turn Switch off and take SD card out
17) You can find save file starting with switch folder > Checkpoint > saves > *Game Name* > save folder name that you input in Checkpoint like Pika for example
18) Compress with RAR or ZIP so submit to here or Discord that OP mentioned in website
Recommended: You can clear the logs to reduce the chance of detection by Nintendo.
If you attempt to get in RCM but boot up with Nintendo logo, so it means your Switch isn't in RCM, so try again until you can see a black screen, no boot up until you use payload to check the command.