How to identify if an SSD is SATA or NVMe B key and m key Explain

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m2_1 slot 2 socket 3, Key M for an NVMe SSD card In addition, I count three SATA data ports on

m2 nvme slot B-key interface can support SATA bus standard and PCI-E bus standard, and it may support AHCI protocol or NVMe protocol M-key interface