FUCK YEAH!
@XaneTenshi @yacepi15 A big thanks to you both!
I restored my Nand and the Boot1/Boot0. It booted.
Now i need to do that firmware update guide again.
Btw, how could i extract my Octopath Save from the "bricked" NandBackup?
Edit: Only first boot worked. wtf. Whyyyyyy.
Edit2: 3. Boot worked. WTTTTTF.
Edit4: it looks like it only doesnt boot if i let the usb c cable plugged in after the inject.
Ok, i maybe want to try something:
I will now copy the "bricked" nand and boot1/0 and will try it again.
I doubt trying to restore the Switch using a bricked Nand will work, but you can try. Also, don't know why the Switch wouldn't boot if the USB C cable is attached after the Payload has been sent, but there is no need to keep it attached once the Payload is successfully received by the Switch anyway.
There may be another way to restore your savefile, but that might be a little daunting, depending on how you updated your Switch firmware. READ the below paragraph in caps first before you try this!!
If you followed the guide here
https://gbatemp.net/threads/how-to-...nofficially-without-burning-any-fuses.507461/ and used ChoiDujour
(not the NX version, which is a HomeBrew
) then you might still be able to mount the Nand backup on you PC using Rajkostos "HacDiskMount" tool, found here:
https://switchtools.sshnuke.net/. The step that you need to follow, loosely, since your kinda doing the opposite, is
step 8.8, but like I said, read the ENTIRE thing, before you do it.
If your PC can still recognize the bricked Nand, you can mount the partition to your PC and access it like it was a HDD. Then copy the contents of the USER folder and save it on your PC. Then either use HacDiskMount to mount the Unbricked Nand and copy over the USER folder or connect the Switch itself to your PC, mount the right partition and paste over the USER folder.
FOR THE RECORD, IF YOU HAVEN'T USED THE REGULAR VERSION OF CHOIDUJOUR TO UPDATE YOUR SWITCH FIRMWARE, I STRONGLY RECOMMEND YOU READ THE ENTIRE GUIDE TO KNOW WHAT YOU ARE GETTING INTO. ALSO, DEPENDING ON WHAT BRICKED YOUR SWITCH IN THE FIRST PLACE, PASTING THE USER FOLDER FROM THE BRICKED NAND TO THE UNBRICKED ONE COULD BRICK THAT ASWELL, SO MAKE SURE YOU EITHER MAKE A COPY OF YOUR UNBRICKED NAND BACKUP, OR PERFORM THE OPERATION ON THE SWITCH ITSELF, SO THAT YOU ARE NOT TOUCHING YOUR UNBRICKED NAND BACKUP.