Co-developed by Sony, SxS professional memory cards are the onboard recording media used in many past and current Sony and ARRI pro digital video cameras and camcorders. If you use SxS media in your workflow, you should use an SxS card reader capable of supporting SxS PRO X and every other SxS memory card at maximum speed. For the fastest ingests, get a Sonnet SxS PRO X Thunderbolt 3 single-slot card reader; it's your perfect tool for the job.