I would like to start a fresh cfw setup on my sw. I have had the current one for years and things are outdated. Do I just format the sd card and go as if new setup? Thanks!
If you've blanked your prodinfo in the past by using Incognito_RCM or similar, make sure not to delete your backup files before you back them up from your SD card. You should have prodinof_sysnand.bin file somewhere on your SD card.
If you need to backup your old saves, you can use
JKSV for that.
Also, if you've made any screenshot or video that you might want to keep, make sure to back that up as well.
After that, remove the SD card from the Switch and format it to FAT32 using a tool like
guiformat. If you were using a hidden partition emuNAND, make sure to merge all of the partitions into one big one. Now you'll have a clean SD card. I'd recommend testing whether it's still working properly with the
h2testw tool.
After that, check the
NH Switch guide.
You don't have to dump your own firmware if you don't want to, it's much easier just to download latest firmware files off the Internet (we aren't allowed to link to those files here, but quick Google search is all it takes to find it).
For game backups to work, you'll need latest
sys-patch (
for firmware 19.0.0 or newer and Atmosphere 1.8.0 or newer only).
If you plan on connecting your emuNAND to the Internet, make sure to setup
90DNS or DNS MITM in order to block Nintendo servers.
For keeping your CFW up-to-date in future, check
this guide afterwards.