dont worry about what the heck emunand is just know that if you find a tutorial those are what it can get you i honestly dont really have an explanation but you dont need one to be totally honest
Emulated NAND, a sandbox where you can install CIAs and break havok without causing a brick.
"Upgrading" to 9.2 lets you have emuNAND, which means homebrew on the home menu (such as emulators), custom CIA installations (aka pirating), editing saves, plus other sorts of stuff (like custom themes).
I think you should look into this: https://gbatemp.net/threads/glossary-of-common-3ds-hacking-terms.414430/
As sarkwalvein said, emuNAND is an emulated copy of your sysNAND. Think of it like a virtual machine on your computer. You can do whatever you want to your emuNAND without affecting your sysNAND. For example, I can keep my emuNAND up-to-date and play on it freely while keeping my sysNAND on 9.2 with homebrew entry points. A person could also do things such as patch signature checks on emuNAND, allowing him or her to install pirated games.
I messed up my first time installing, and I thought I was toast but eventually I got it right (with all my data intact!). So good luck and read every line of instruction!
If you have access to an entry point like ninjhax and you're on 9.3-10.3, I would use SafeSysUpdater to downgrade to 9.2. Aside from the small yet mentionable brick risk of downgrading, there's no reason not to be on 9.2+emuNAND. It has all of the benefits with none of the downsides.
I believe he means he is on a system version higher than 10.3. You can still downgrade to 10.2/10.3 with a hardmod, and from there downgrade to 9.2.
Ah I assumed you were on 10.3 at most. Like others said, too bad so sad unless you're gonna hardmod.
