I'm DSi downgrading soon and I have stuff on my n3DS I wanna keep... I tried JKSM but the homebrew didn't work for half of the games and even gave me a yellow screen once. I want something that works. I want to backup all my games' saves. Thanks.
Since they are going to do DSi downgrade it doesn't sound like they have cfw yet. If they do then FBI or JKSM cia file would work great.You can copy the save data using FBI (atleast if you injected it into your custom firmware).