svdt sysnand>emunand

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\   Copying save files from sysNAND to emuNAND with svdt    \
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Im going to assume your on some kind of cfw and have some kind of native hax to get hbl (browser/menu)
Required extra files that need to be on your SD before starting
[1]https://github.com/yellows8/hblauncher_loader/releases

0: !IMPORTANT! Create savedata on the emuNAND game install

1: Boot hbl via hax

2: Launch svdt and navigate to the game you want to backup (we are in sysnand right now)

3: svdt will say something about invoking a basic backup in green on the bottom screen, this creates a folder called svdt in root (this is different from root/3ds/svdt)

4: While still in svdt navigate (on the SD side of the menu) to this folder and the game subfolder (root/svdt/game_name) and note the numbered folder (its a date format)

5: Restart and go into CFW

6: Using you preferred cia installer, install [1]

7: Boot Homebreaw via the HBL you just installed (will be new software you have to unwrap)

8: Open svdt and select the game you want to copy your saves to (we are in emunand now)

9: navigate to the dated folder we noted down earlier on the SD side of the menu (make sure its the correct one, when you boot svdt again it will create another folder from the save data in emunand)

10: !IMPORTANT! highlight the root (with >>) on the SD side of the menu (the folder name, not the /...) and press Y, then press L+R+Select

11: Restart and launch into CFW and load up you game, you saves should be transferred.

I will note this is only useful for sysnand to emunand transfers, and specifically when you fucked up and didnt backup you savedata in emunand with savefiler before unlinking and you dont want to clone old emunand/nand.bin/sysnand and redo any games youve installed since.