you will need Ironhax, Ninjhax or tubehax.
Save Data Manager
(im using sky3ds btw)
I will show how I did it with ACNL save, I think it will work the same way for other game save.
ok, restore your old save (the one that has a public header) using diskwriter)
turn off your wireless to not be banned
load the game to see if the save was restored.
close the game and load the homebrew.
open the save manager, load the game and backup your save.
now, you need to backup your save using diskwriter.
open HxD and load your backuped save and edit the header. (doesnt mater the ID, just change something) and save.
open diskwriter and restore this edited save.
load the game.
you will get a message saying that your save is corrupt and you must start a new one.
start a new one and now it has a private header (you can check it using HxD)
open the homebrew again and load the save manager, restore the save.
after doing all that, if you check your save game you will see that your old save now has your private header.
sorry if I made it confusing, but that worked for me on animal crossing new leaf.
I edited my old save using RAM editor before restore it using save manager, but watever, you can do it later too if you like.
I'll upload some pics soon
please give a like if it helped you
thanks
Save Data Manager
(im using sky3ds btw)
I will show how I did it with ACNL save, I think it will work the same way for other game save.
ok, restore your old save (the one that has a public header) using diskwriter)
turn off your wireless to not be banned
load the game to see if the save was restored.
close the game and load the homebrew.
open the save manager, load the game and backup your save.
now, you need to backup your save using diskwriter.
open HxD and load your backuped save and edit the header. (doesnt mater the ID, just change something) and save.
open diskwriter and restore this edited save.
load the game.
you will get a message saying that your save is corrupt and you must start a new one.
start a new one and now it has a private header (you can check it using HxD)
open the homebrew again and load the save manager, restore the save.
after doing all that, if you check your save game you will see that your old save now has your private header.
sorry if I made it confusing, but that worked for me on animal crossing new leaf.
I edited my old save using RAM editor before restore it using save manager, but watever, you can do it later too if you like.
I'll upload some pics soon
please give a like if it helped you
thanks