CFexpress memory cards are high performance memory cards for videography and photography. If you’re looking to shoot 8K video, or capture high-resolution stills at a fast burst rate, then CFexpress is realistically the format you’re going to want to use. Though of course, using the format does require a camera with a CFexpress-compatible slot – which only some cameras have. It tends to be the preserve of professional and high-end enthusiast models.