Thank you
- emuMMC and sysMMC operate independently of one another so if you update one, it doesn't affect the other so updating only emuMMC is the only way you can update emuMMC. As for how to update emuMMC, you can use the homebrew app Daybreak which comes bundled with Atmosphere
- New masterkeys are added every major firmware revision. However unless you are repacking games or datamining, there is very little use for these keys.
- Follow this guide if you have not found one yet












