How to Add NVMe SSD to your Motherboard

i plan on getting a second but my motherboard has 1 slot and 1 slot I currently have a Kingston nv2 1tb so i was wondering

Supports PCIe motherboards and is backward compatible with PCIe and PCIe Also supports PCIe x1 bus slot The NVMe PCIe card

nvme m2 ssd slot A 16-lane device built on the PCIe specification can support approximately 32 GBps The 2 TB Samsung Pro PCIe NVMe SSD retails for about $160, the 1

nvme vs m2 slot difference  An 2280 solid-state drive , 22 mm wide and 80 mm long Connects to, Motherboard via one of: PCIe ×4; PCIe ×4; PCIe ×4; Serial ATA