[FAQ] How to prevent updating the SysNAND

​

Your shiny brand new 3DS console just arrived, it is on a good FW version, and maybe it's even your first 3DS console ever. Now, one of the biggest fears of new users is accidentialy updating the SysNAND, rendering their 3DS incapable of running exploits needed for homebrew, CFWs or flashcarts. That fear is not completely irrational, judging from the sheer number of "Am I screwed?" threads here. But, don't worry, I'm here to...​