Hardware Does system format downgrade 3ds versions

[Hiyaaa!]

I bought my 3ds at 4.2 if i system format, will i go back to that?

 

[Hiyaaa!]

No....
Downgrade with the Gateway launcher.dat.

How exactly?
(Sorry if that came off as rude)

 

[Hiyaaa!]

First of all, what firmware is your 3DS currently?

9.5 US Q-Q

 

[osm70]

9.5 US Q-Q

Sorry, you cannot do anything.

 

[Hiyaaa!]

Dagnabbit!

Oh crap. On 9.5 you can't downgrade unless you had a NAND backup before you upgraded and can hardmod your 3DS (basically, you can't downgrade)

"Today we present just a quick update for our users with 9.5 emunand. This fixes the multirom menu not showing up and various updates for properly supporting 9.5 emunand.
We also want to inform our users about some news regarding emunand support for the New 3DS:
We will not be able to support emunand 9.5 or higher for a while on the New 3DS. This is only an issue for the New 3DS, the old 3DS and 2DS will never have this issue. This is not a definitive barrier, but we feel it necessary to inform our users that while we are still working on releasing our New 3ds support, we will not be able to provide support yet for 9.5 emunand or higher for New 3DS on release.
And as always ENJOY!"

I'm so confuse.
(WTF is sysnand and emunand anyway?)