The definitive word on np12.2 and an sd ca rd? ????

[Nychotxxx]

I have a SanDisk sd card arriving today for my note pro 12.2. I've read all kinds of conflicting information on what can or cannot be copied to sd cards FROM the tablet and TO the tablet from the card. I've also read conflicting information on whether the card should be used virgin from the start or formatted a certain way. So my question is : what are the definitive rules and tips regarding using an sd card with the note 12 running kit kat.