I upgraded my switch to 8.x using choirdoirNx and selected everything correctly but now my switch won't boot up past the Nintendo Logo. Goes Black screen and gives me an error message. System is not bricked i can load OFW fine just not CFW. So this means it had something to do with the upgraded files i used maybe not the right ones. Or maybe, I did forgot to disable RCM Mode before I updated which could also be the cause. So I have a nand backup already my question is how do I perform the back up using XS OS and do I have to do the NAND Restore or is there another method I could use to restore my system?