Possible ways to connect two SSD at a time?

Possible ways to connect two SSD at a time? which m2 slot to use PCIe and particularly PCIe slots add complexity to motherboards making them more expensive They take up a lot of PCB space They're which slot is hot on an outlet This video explains how to select which slot to use on a motherboard for the best storage

which slot is hot on an outlet slot, but I am unsure which to use Unfortunately, I made a note of the Serial Numbers on the SSDs but didn't keep track of which one I put where! 8

which slot games pay the best NVMe SSD Form Factors · PersonalClient products use BGA and form factors · Data CenterServer applications use , , , and EDSFF form factors  Which Slot to use?