Which slot should I use for my SSD?

Which Slot to use? m 2 drive slot 1 x connector , integrated in the Chipset, supporting Socket 3, M key, type 22422260228022110 SSDs: Supporting PCIe m2 slot pc 2's in a PC They are all 970 Pro 1TB I am continuously having to remove drives and power up the PC to see which drive I just removed Bit of

m2 sata vs nvme slot 2 slots are similar to PCIe expansion slots but are much smaller And this makes them perfect for SSD drives with a form factor similar to a RAM stick