Update August 2025: Since this post was published, most brands now offer CFexpress gen 4.0 cards, replacing many of those listed below in performance terms. Minimum sustained write speeds have improved greatly, making many more lower-priced cards suitable for high-grade 4/8K in-camera capture. Nevertheless, due diligence is still required with these cards. That said, one further benefit of the new type 4.0 standard is a sizeable reduction in the price of the high-end high-speed gen 2.0/3.0 cards listed below. CFexpress (Type B) cards are expensive, so choosing the right type is an important decision. As both the Canon EOS R5 and Nikon Z8 have a second SDXC UHS-I/II compatible card…