Sony has announced the new CFexpress Type B spec and its newest CompactFlash memory card that is supposed to be faster than anything else on the market. The new cards read and write speeds are 1,700 MB / s and 1,480 MB / s, respectively. That stomps out Sony's previous fastest card, which topped out at 630MB / s.
The new CEB-G128 memory card will come in 128GB and 256GB storage versions, with even bigger 512GB variant "planned for the future." Sony also announced a new CFexpress card reader – so you can move files off the card – that's sold separately, called the MRW-G1
While microSD and SD cards are more common in smartphones and cameras, respectively, CompactFash cards are still used in high-end camera equipment. In a studio scenario, where filming happens for long durations and recorded files are getting larger with the arrival of 4K content, having faster read / write speeds is a big advantage over older, slower cards, even if cards are smaller and less cumbersome.
Regarding availability, Sony's new CFexpress memory card and MRW-G1 card reader will launch in the early summer of 2019, with pricing to be announced.