Preface: I am using my old N7 until there are new Note7s for an exchange. I have no overheating problem, and for my device, it believe an exchange is only a safety first, though probably unnecessary deal, but....
Anyway, I got my 256 gig card! Wow, that baby is fast! I have a lot of full length movies and TV series on MP4 files, and I was transferring about 11 gigs of files at a time, and it would take a couple of minutes each for each batch. I put 14 gigs of music, about 6 gigs of pictures and 135 gigs of videos on the card in no time. What a pleasure. I now have 30 gigs internal and 83 gigs external free; I can't believe it - 113 gigs available, still! I have many more movies I could add. It's so roomy. My pc only has a 256 gig SSD.