Ultra High-Speed Media Format. This ProGrade Digital 800GB CFexpress 4.0 Iridium Type B memory card delivers write speeds of up to 3000 MB/s, sustained write speeds of 1500 MB/s, and read speeds of up to 3550 MB/s, which ensures an efficient solution to quick offload transfers to your computer.

VPG Rating and RAW Recording. With a VPG-400 rating, your write speeds with this card are guaranteed to not drop below 400 MB/s. This memory card is capable of recording raw 8K, 6K, and 4K video.

Refresh Pro Compatible. This Iridium Type B card is compatible with Refresh Pro, which is a separately available program designed to make sure your memory cards are performing at their absolute best.