In the previous SD 6.0 specification, the data transfer rate in full-duplex mode was up to 624 MB/s, and the storage capacity was also limited to 2TB. SD Express brought a disruptive change in that its maximum data transfer rate was up to At 985 MB/s, the capacity is expanded to an astonishing 128TB. It also provides backward compatibility with current devices.
SD Express uses a widely used protocol in both popular PCI Express (3.0) and NVMe (V1.3) industries, providing an excellent new option for all types of devices. SDA President said that SD 7.0 offers revolutionary Innovation to meet the needs of upcoming IoT devices and content.
However, the SD Association is only responsible for the development of standards. In the end, how many manufacturers can pay and go to the general public, it is still unknown.