SD Express Memory Cards with PCIe® and NVMeTM Interfaces
New SD card standard 'SD 8.0' has been introduced, and PCI Express 4.0 has been adopted to achieve a transfer rate of up to 4GB / s. - GIGAZINE
What's new with the SD Express 8.0 Spec? - Dignited
Amazon.com: Professional Ultra SanDisk 64GB MicroSDXC Card for Samsung Galaxy Note 8.0 Smartphone is custom formatted for high speed, lossless recording! Includes Standard SD Adapter. (UHS-1 Class 10 Certified 30MB/sec) : Electronics
SD 8.0 Specification Offers Significant Boost In Transfer Speeds