As far as I know, there is only one way to backup save games in a way that has minimal chance of a ban. This is
only for backing up, no editing. No tools exist to edit these yet as far as I am aware.
Get
TegraRCMSmashGUI. Unpack to a folder somewhere. Call it something convenient, like
Tegra.
Go
here and download
biskeydump,
memloader, and
HacDiskMount.
Unpack
biskeydump.bin, and
memloader.bin. Put in the
Tegra folder.
In memloader.zip, there is a folder called
sample. Unpack the contents to your SD card.
Turn off your Switch, get jiggy, and go into
RCM mode.
Launch
TegraRcmGUI. It should say "
RCM OK" in the bottom left of the UI. Select "
biskeydump.bin" as the payload, and click
Inject Payload.
Note down everything manually or take a shot of the QR code, then save it somewhere.
Press the power button to turn off your Switch, get jiggy, and go into
RCM mode.
Go back to
TegraRcmGUI. It should say "
RCM OK" in the bottom left of the UI. Select "
memloader.bin" as the payload, and click
Inject Payload.
In the resulting screen, select "
ums_emmc.ini". If this option is not present, you didn't do step
4 correctly. Turn off your switch, and go do it. Continue from step 8.
Once selected, press power once.
Launch
HacDiskMount,
run as Administrator. Go to
File-Open physical drive.
You should see "
Linux UMS disk 0 (21.121 GiB)" or something
very similar. Select this then click OK.
Now you should see a list of items starting with
PRODINFO and ending with
USER. Double click
USER.
A window called "
Operations on USER" should have appeared. At the top it should say "
BIS Key 3", along with two text boxes for
Crypto and
Tweak.
Go to the keys you noted from
biskeydump. Copy the correct keys from this to the appropriate text boxes. Click
Test. If the result is green with
OK! Entropy, continue. Otherwise double check your keys.
Below the keys section there is
Virtual Drive. Click install, if it hasn't been done already after previously following a different tutorial.
Select an empty/unused drive letter. Click
Read Only (for safety). Click
Mount.
Open Explorer, navigate to the newly mounted drive. If nothing appears or Windows says it needs to be formatted, abort and check your keys.
In the mounted drive, you will see five folders (
Album, Contents, save, saveMeta, temp) and one file (
PRF2SAFE.RCV). Copy
save and
saveMeta somewhere safe, and good luck identifying which one is which.
Click Unmount in HacDiskTool. You can now turn off your Switch, hold down Power for 13 seconds.
Now, wasn't that fun?
