Hello guys, After I needed to do this and one user asked me how I did this for his own reasons, I decided to create this little tutorial explaining how you could downgrade from 9.2< to 4.X using Gateway DGPacks while keeping your old sysNAND data, like Miis, Mii Plaza data, StreetPass and Friend List. I claim no credits for this as I only used already released work (tools) from other people. Credits go to the creators of: 3DSFAT16tool 3DS Multi Decrypter etc TIP1: It's required that you take NAND backups. It doesn't really matter what "type" of backup you take: GW or HW mod. Although having the HD mod will save you if something goes wrong in the first try (as it happened to me, but since I was going this on emuNAND I just wrote back a backup and started over) Prerequisites: 1) Python 2.7.9 64bits 2) 3DSFAT16tool (here) 3) 3DS Multi Decrypter (here) 4) slot0x25KeyX.bin (I won't give it to you but you know how to find it... Google is your friend! ) 5) WinImage (here) The steps: 01) Do a backup of you current 8.1 sysNAND and ENTIRE SD Card!!! 02) Downgrade to 4.5 using Gateway ULTRA + DGPacks (Gateway downgrader) and do a backup of it!!! 03) Using the 3DS Multi Decryptor extract your NAND XORPADS (4th option) 04) Using 3DSFAT16tool extract your 8.1 sysNAND FAT16 (the one you have the data to be extracted) and your new 4.5 sysNAND FAT16 05) Using padxorer.exe un-XOR both FAT16 partitions (very straight forward) 06) Rename the .out files to .iso so you could open them with WinImage 07) Using WinImage extract the following "saves" from your 8.1 sysNAND (the one you have the data to be extracted) to some place in your computer 08) Using WinIso inject the saves you extracted to your 4.5 sysNAND (the downgraded and clean one) 09) Save your 4.5 FAT16 ISO file 10) re-XOR your modified FAT16 file for 4.5 NAND with the same command 11) Using 3DSFAT16tool inject your encrypted modified FAT16 to your sysNAND 4.5 *** If everything went OK until now you should already have a working 4.5 sysNAND with your old NAND shared saves working. This is good! *** Do not boot your 3DS yet! *** Since the saves are "split" (some of them) between the SD card and the NAND, you'll need your SD card inserted before booting. 12) Insert your SD card (I'm assuming you did a backup of it just in case anything goes wrong). 13) Turn your 3DS on and see if everything is there. If not, double check you copied the correct saves and your SD card if properly inserted. TIP2 The very first time I opened my Friend List, after a ridiculous amount of time (more than 5 minutes) the console appeared to be frozen, so hard powered it off and did the process another time from scratch. The second time it "hanged" for too long again, then I shouted "f*uck it" and left the console alone. I went to do something else and after 20 minutes, when I came back, the friend list was there, so don't panic if your Friend List takes too long to open. For the sake of sanity I did the whole process a third time and timed the Friend List opening from tap until it actually open. It took 10 minutes! PS: if you see any error or if you have anything to add, please, post bellow! Thanks!