Before starting! Useful TIPS: Do not skip any of the parts! Double check your system version before updating your Emu Nand! Because A LOT of people want a tutorial about updating your emunand here is what you need to do: (READ ME Follow ALL the steps correctly! If you skip any of them your 4.X.X 3DS (XL) will be updated.) (I warned you! Follow this tutorial WITH CAUTION!) Requirements: A Flashcard with the GW Files (You can find these on the gateway site) I used DSTwo but you can use your Gateway one or R4 etc An SD Adapter 2GB + (Usually comes with your 3DS) A 3DS With 4.X.X FW (If it's higher than that you can stop reading now) and Charged 100%! (Wireless must be OFF) A GW3DS Flashcard (Which I don't own ATM to play your backed up,downloaded games!) And a brain First of all you might want to open the 3DS Settings! Then Choose Other Settings! After that Profile! Then Nintendo DS Profile (Press L and keep holding it) Till you get here Then this menu will show up Here is what YOU need to follow WITH CAUTION First of all PICK This will Take 10 Minutes Aprx. After that transfer your back up from your 3DS SD Card to your Computer. Then (If you skip this you are as good as screwed same goes for the above) This will take 5 Minutes APRX. (After that I think your 3DS will restart!) After ALL that pick go ahead and do the same procedure as before and THIS time pick Gateway MODE and go to system settings! This is where your Emunand takes place! Check your Firmware Version it will be Like this! (with the GW3D in front of the FW Version I have already Updated mine so that's why it's on 6.X.X FW IF YOU DON'T SEE THIS DO NOT UPDATE! (Go BACK to the GW menu and do it again UNTIL you see this in front of the system version!) DO NOT turn off your 3DS! If you turn it off everything will go back to normal and the NAND! and you will have to go through all the process again! After the above when you are going to update to 6.X.X (EmuNand) Now you can turn on your wireless! DO NOT Update from a cartridge as you will be prompted to update again to access the Eshop for some reason! After you update! Note if you boot into classic mode you will only see 6.3.0-12 with no GW3D in the front Classic Mode is for booting 3DS Retail Games,APPS ETC Gateway Mode is for booting 3DS Pirated Games with your 3DS Flashcard! More Tips for the 2.0 FW! http://gbatemp.net/threads/answers-for-most-common-gateway-2-0-questions.358509/ Now for the people who accidentally updated their System Nand(?) you might wanna see this with 3DS XL: http://gbatemp.net/threads/nand-flash-dump-3ds-xl.350668/page-29#post-4843862 If you want to "transfer" Games,Apps etc from an newer Nand to an older (Requires Soldering!) http://gbatemp.net/threads/sys-transd-nand-injected-into-gw2-0b1-emunand.358545/ You can only Downgrade with your NAND back up you made before BUT you need to solder your 3DS XL You can point out any mistake you see I will update this thread as much as I can!