SaveDataFiler does work, but I would recommend you switch to JK's Save Manager. It's a better alternative for a number of reasons, most prominently that it shows the Title Name rather than the Title ID.This is all a lot to take in, admittedly. It's one reason I'm waiting until Wednesday, when I have more time to go with a path (depending on what I commit to).
One thing I definitely got comfortable with, and appreciated doing, was using savedatafiler to be able to dump saves for save editors (Pokemon comes to mind). It was my understanding that SaveDataFiler stopped working if your sysNAND went beyond 4.*. Is that still the case?