Since an NVMe SSD will never work on a SATA M.2 slot, if an SSD doesn't fit into the M.2 slot, it's a good indicator that your M.2 SSD uses a newer interface that is incompatible with your ...

Even if you’re never going to design a M.2 card, now you know how to tell SATA and NVMe M.2 SSDs apart, and why pushing a B-key 4G card into your M-key SSD slot will not result in anything good.