Ideal for professional photographers & videographers, the POWER SD card boasts the fastest available speeds and supports data-intensive modes, including 8K video.UHS-I vs UHS-II The UHS-I bus interface allows for transfer speeds up to 104 MB/s, while UHS-II boasts significantly higher speeds up to 312 MB/s. This is due to UHS-II cards being designed with two rows of pins, rather than one like UHS-I, which allow for two lanes of data transfer. Speed Class Speed Class (Class 2 to 10), UHS Speed...