I feel really stupid know... I was typing in the wrong password this whole time 0.o
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you dont need a hardmode to restore a nand backup if your ds is still working and you have access to the gateway menu, right?
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Were would you find the one for your firmware?
Yes you can restore nand backup from gateway menu. Enter the downgrade menu while holding up to restore a NAND backup
You would have to download a firmware patch from 'that 3ds site with isos' > Find the right title > place it on msd > remove the title from 3ds with title manager (FBI) > install correct title. If you were to screw this up, you could brick your 3ds.
Nintendo's servers.
3DNUS no longer works, Nintendo took down the older firmwares from their servers.
I didn't mention manually updating the mSET, since it's quite a bit riskier for a beginner. Also figured it was basically in the same group as updating the firmware.

