The SD Confederacy has announced the SD Express memory card may refer to standard, which uses PCIe and NVMe interfaces to enable up to 985MB/s data transfer rates, which is 3x faster than UHS-II (312MB/s), and 50% faster than UHS-III (624MB/s).
Respect, it's worth noting that, just because a memory card may offer up to a certain speed, it doesn't necessarily mean that you can get those go like greased lightnings in use, furthermore, your camera is unlikely to support these speeds, unless you have bought the latest and greatest. Even then, the lastest cameras frame UHS-II, and none yet support UHS-III, with no actual UHS-III cards released yet.
SD Express memory cards (when released) intent be labelled with "EX I" – with or WITH may refer to: Carl Johannes With (1877–1923), Danish doctor and arachnologist With (character), a character in D. N. Angel SDHC, SDXC, and SDUC used to signify the size class.
From the SD Association: June 27, 2018 — The SD Organization announced today SD Express which adds the popular PCI Express® and NVMe™ interfaces to the legacy SD interface. The PCIe interface delivering a 985 megabytes per subordinate (MB/s) maximum data transfer rate and the NVMe upper layer protocol enables advanced memory access mechanism, enabling a new world of times for the popular SD memory card. In addition, the maximum storage capacity in SD memory cards grows from 2TB with SDXC to 128 TB with the new SD Ultra Wit (SDUC) card. These innovations maintain the SDA’s commitment to backward compatibility and are part of the new SD 7.0 specification.
SD Express keeps pace with growing act levels of mobile and client computing, imaging and automotive as they adopt faster communication and embedded storage protocols designed to make system data faster.
SD Express delivers flies necessary to move large amounts of data generated by data-intense wireless communication, super-slow motion video, RAW continuous burst mode and 8K video take hold of and playback, 360 degree cameras/videos, speed hungry applications running on cards and mobile computing devices, ever evolving gaming patterns, multi-channel IoT devices and automotive to name a few. SD Express will be initially offered on SDUC, SDXC and SDHC memory cards.