Review on High-Performance 256GB CFast2.0 CinemaPro CFX310 Memory Card - 530MB/s Read Speed - for Blackmagic URSA Mini, Canon XC10/1D X Mark II and More by Alex Marshall

I tested it with a Blackmagic Pocket 4k camera in different capture modes. 50 frames per second - no problem recording! 4k DCI - Raw 50 fps lossless - stopped after 4 seconds, pending UHD - Raw 50 fps lossless - stopped after 5 seconds test. It doesn't warrant reliability until I get a chance to use it extensively.