The Kingston A4000 is a NVMe solid-state drive (SSD) that uses the NVMe interface and is based on the M.2 form factor. It typically uses one PCI-E lane for its operation.
It uses a PCIe 3.0 x4 interface, which provides a maximum bandwidth of 32 Gb/s, and it is backward compatible with PCIe 2.0 and 1.0 interfaces.
It also supports S.M.A.R.T., TRIM, and garbage collection.
Please note that, even though the Kingston A4000 uses one lane, it does not necessarily mean it will consume that lane entirely, as modern NVMe drives can share the lane with other devices.