Which slot should I use for my SSD?

PCIe NVMe SSDs also have their own NVMe storage controller built 2 slot has a different Key configuration depending on the drive type

PCIe NVMe drives are 'M' keyed SATA ones, however, are 'B+M'

nvme pcie slot In particular SATA SSDs are usually B+M key, so you can use them in any slot that supports SATA There are also NVMe SSDs with B+M key, but

nvme 40 in 30 slot Does this mean I am able to insert a B&M key SSD with 2242 form factor in this slot? If yes, does the slot accept NVME or SATA or both types of