i always use SDF, at first i was too dumb to use it,
but now it has become so important for me, i back up my cia games saves once every month and store them up on my computer and my hdd just in case my sd card or my nands fuck up !
SDF is simply export and import thing . (3dsdb helps alot in knowing what save game you want to back up etc. so i use that one too, and made a notepad text file and add my uniqueID codes of the installed games i always play just as a reminder)