Amazon.com: Sintech nVME USB SSD Card,USB 3.0 M.2(NGFF) M Key SSD External Case Box with USB 3.1 Type C Connector(Not Support M.2 SATA SSD) : Electronics
NVMe M.2 SSD to PCIe X16/X8/X4 Card - Sabrent
The M.2 interface
Understanding M.2, the interface that will speed up your next SSD | Ars Technica
M.2 - Wikipedia
M2 Debugging - Confused about M2 Alert and other signals usage