NVMe SSD to PCIe x4 Expansion Slot

What is a PCIe SSD? m2 pcie slot Furthermore, other expansion slots run under a PCI Express interface with smaller form factors, such as mPCIe and slots There is one PCIe m2 vs nvme slot Hi, I currently am using a Pi 5 and I have connected via a Blue USB slot an External SSD enclosure, with an PCIe Gen 4 NVMe SSD in it

m24 slot The card physically has an X4 interface, so it could be plugged into an X4, X8, or X16 slot It can still physically only access 4 lanes (else