RAWNAND.BIN backup - Either combined, or consisting of 15 or 30 parts totalling roughly 29GB. This contains the majority of your switch's backup, this is mandatory to restore.
BOOT1 files (these are required too, and tied to your
RAWNAND.BIN backup, if you do not have them, do not attempt restoring your
RAWNAND.BIN is one file, your SD card will need to be exFAT for the restore process, FAT32 is limited to 4GB files. You can split the
RAWNAND.BIN with 7-zip, use this page to do that if you need to.
Inject the latest Hekate payload to your switch with your SD card in your console (this would be
Backup eMMC >
eMMC BOOT0 & BOOT1 (this will take a minute or two to run.)
Once the BOOT0 and BOOT1 backup is complete, you now have the required
<sdroot>\backup\XXXXXXXX\restore folder path on your SD card. Hook up your SD card to your computer (Hekate's SD mounting, or just plug the SD into your computer.)
RAWNAND.BIN (combined or in 15 or 30 parts),
BOOT1 files to the
<sdroot>\backup\XXXXXXXX\restore folder on your SD card.
Plug your SD card back into your switch, and inject Hekate's
hekate_X.X.X.bin as your payload.
Restore eMMC. Select
eMMC BOOT0 & BOOT1 (This will take a few minutes to finish, close once done).
On the same page, tap
eMMC RAW GPP. This will take 20-60 minutes to finish depending on your SD card.
Boot Hekate by injecting Hekate's payload (
Console Info >
HW & Fuses.
On this page, you will see
Burnt Fuses with a number next to it. Use this chart here to know what firmware version that fuse count corresponds to.
For example, if your burnt fuses are 11, the lowest firmware you can upgrade/downgrade to without needing RCM and a payload to boot would be 9.0.0