do you need a sd card for gopro hero 5?
GoPro recommend SDHC cards with a class 10/U3 rating for the Hero4, Hero Session, Hero5 Black, and Hero5 Session. A Class 10 SD card (U3) is the best choice regardless of what you are using it for. ... There is always a danger that if your SD card isn't up to it that you could encounter error messages or loss of data.