Yes. If your NAND backup is 6.2
If you are doing NSP installs via USB, there is no need to split anything. What situation did you need to split an NSP?
Anyway, starting from scratch isn't the worst thing. It's kind of fun. In the process you learn to back up NSPs you'd like to keep around to. If you don't have backups of the custom made NSPs, that's difficult if there are very many.
You can try 6.2. But if that doesn't end up working, I'd recommend doing over with fresh and new.
Have you ever been through this situation? I'm afraid to restore and start bugging games!
I'll briefly explain what I did - I followed a tutorial on youtube where a guy teaches you to upgrade to 8.0.1 with ChoiDujourNX! In the video after installing the update some games of it do not work! So in the comments he says to use a different SD just to install the 8.0.1 update and generate the drive from the Nintendo folder!
So I used a 64GB SD, formatted it in exFAT and used ChoiDujourNx to install the update. At the time of installing the card drive I chose the exFAT option. When it all finished, I copied and pasted the Nintendo folder over the Nintendo that I use on the 128GB FAT32 Card! Of course, I saved the files that would be replaced before replacing!
What was not clear to me in this Offline update of ChoiDujourNx is if I could have installed the update using my FAT32 SD with the original Nintendo folder ?! At the time of choosing the drive I would choose exFAT for SD FAT32 or not ???
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Try with ReiNX?
Look what I wrote now to "tabzer"a full format on your SD goes a long way