The SD Association, a non-profit organization responsible for the creation of memory card standards, presented the new microSD Express format at MWC 2019. It received a second series of contacts and support for NVMe 1.3 and PCIe 3.1 interfaces used in high-speed solid-state drives for personal computers. Thus, the new memory cards will provide data transfer at much higher speeds.
microSD Express supports a maximum speed of up to 985 MB/s while maintaining backward compatibility with the previous standard. Such cards will be offered in different versions: microSDHC Express, microSDXC Express, and microSDUC Express.
"microSD Express provides the mobile industry with a whole new choice to equip mobile devices with removable solid state drives. This format prepares consumers and manufacturers of mobile devices to meet the ever-growing demand for data storage for years to come," said Hiroyuki Sakamoto, President of the SD Association.
In addition to the increased data transfer rate, microSD Express cards are also more energy efficient in comparison with standard microSD cards. They will support the power-saving mode L1.1 and L1.2 defined in the PCIe 3.1. They also have the ability to interact with other components without checking communication with the processor, which significantly speeds up multitasking.
The timing of the emergence of the first cards of the format microSD Express has not yet been announced.