drive not showing in Windows 10

I can NOT enter BIOS with SSD in 1st slot The SSD is working fine in the other slot I

xyz: Generally speaking a B+M key does not work in a M key slot You must use a B

m2 slot screw Crucial P1 SSD is already installed on Gen Gen Slot is empty (For some reason my Crucial P1 SSD did not work on

m2 sata vs nvme slot PCIe x4 to single PCIe The most obvious adapter, unlikely to cause problems You also see a variant of these with a second slot for a SATA