If you're shooting a 2.7K or above there are some cards that cannot handle that bit rate. A recent firmware update solves this by lowering the bit rate when the camera detects a card that can't handle it. There is a small list of GoPro-approved cards.
I never shoot above 1080 as I wish to sell my work and have no need to see my gear, my props or for a fisheye look.
I never shoot above 1080 as I wish to sell my work and have no need to see my gear, my props or for a fisheye look.