Some friends don’t know what protocol their interface supports when buying M.2. They are afraid of buying the wrong one, or they don’t know what protocol the M.2 plugged into their computer supports. I will give you several methods below. The external distinction can be seen in the appearance and logo of the interface.
1. Look at the appearance of the interface. There is one NVME and two SATA. (It is not universal, just a method)
2. Check what protocols are supported on the M.2 hard disk.
3. The host checks what protocols the inserted SSD supports.
(1) When pin 69 is detected to be floating, it will be displayed that the SSD is of NVME protocol.
(2) When pin 69 is detected to be grounded, it will be displayed that the SSD is SATA protocol.
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