Just doing a copy-paste from another thread (not of my own) because it's easier, and I'd rather not interrupt that thread anymore with such a large post and multiple questions. Ok, so let's say I'd want to switch from rxTools to A9HL + AuReiNAND. I have an o3DS 9.2.0-20U sysNAND and 10.7.0-32U emuNAND (the latter which I pretty much do everything with, like play games I've installed, run the HBL cia, work on homebrew, etc). If I were to make the change, would I lose/invalidate what I have in emuNAND? The guide mentioned here not only talks about RedNAND (which has differences from emuNAND), but the guide itself seems to speak about not having an actual alternative NAND on the SD card once all the steps are done, as everything would be on the sysNAND. Is that right? I've been using emuNAND because I've tried to keep a safe distance from messing too much with my sysNAND. The first 2 steps of the guide aren't a problem, as I have HomeMenuHax installed already (with a Cubic Ninja and prepared OoT copies if I need them), and I'm already on 9.2.0-20U, so I can clone my sysNAND to make the RedNAND. The 3rd step is where I start having questions. Step 3: If I understand correctly, the only reason for RedNAND is for step 4, where I grab the OTP? Also, a thing to note. I believe when I had my emuNAND unlinked from my sysNAND, I also tied my NNID to that (though I think it is also tied to my sysNAND? I'm really not sure at this point since it has been so long since I used the eShop on either NANDs). How shall I check this, and do I need to do anything prior to starting this guide with my NNID? Step 4: Now from this step on scares me, because it talks about downgrading RedNAND (not a problem) then flashing it to sysNAND to grab the OTP. Doing something like HomeMenuHax isn't as much of a problem for me, but basically rewriting the sysNAND? That's raising flags for me. Also, the "Cross you fingers" steps....Why does that make me uncomfortable? Step 5: This is where I'd choose whether to use AuReiNand or CakesFW. If all I wanted to do was install/play games (including unsigned GBA/DSi games), work on homebrew via HBL installed, etc, would AuReiNAND provide that? It's said to be "noob-friendly", but I guess because I don't really know what I could do with CakesFW to warrant using that, I guess AuReiNAND would be fine for me. Also, where it says "You will no longer be able to boot without the SD card in, that is normal", it would be safe to remove the card after boot, right, unlike running under emuNAND? Ok, after all that, I still am concerned about some things. What would happen with my existing emuNAND regarding all this? I guess I can reinstall the games, but I'd imagine that I'd lose my saves. Is there a way to backup my saves from my emuNAND prior to making this change, then restore them afterwards? What about my NNID, my digital purchases, eShop (with regard to my purchases, as well as non-purchased DLC)? What about updating like I have done with emuNAND (so various games can work)? What about if at some point in the future, Nintendo comes out with a new handheld, and transfer are done like they have been this gen (assuming they still haven't gotten around to making a universal account system where I could just use my account name/pass to access my stuff)? Sorry for all these questions, some of which are probably in the guide but aren't quite clear to me. Messing so deep into the system always makes me hesitant. Thanks everyone for your responses and help, even if this isn't even my thread. Might have more questions later, but this should start me off.