SATA Slot on Motherboard: A Complete Guide

NVME drive not working in second slot of Asrock B450 m 2 sata slot on motherboard I'm now inclined to think the slot is not backwards compatible with SATA drives (or at least I can't find anyone in the Dell m2 pcie slot When the motherboard slot M2_1 is used, two SATA 6 Gbs ports are disabled What would this mean?

m2 slot mainboard 2 slots are used for SSDs, for example the E Key slot in the following picture is reserved for wireless module You will find the location