Had a friend that rented out his fishing boat and while doing so took videos (to make CD's to give to the customers) with his GoPro and he found that some of the SD cards he was using wouldn't playback properly; come to find out the SanDisk Extreme Pro's where the only ones that worked properly (because of the resolution & time lengths); the Samsung Pro Plus is a highly rated card, as all the Xtremes and Pro Pluses types usually are...inexpensive sd cards can be a headache.