Maximize your performance with this external 250 GB SSD drive. The form factor is M.2 and it wirelessly connects the hard drive to the motherboard.
From Amazon
Lexar NM610 250 GB PCIe 3.0 (up to 2,100 MB/s) NVMe M.2 Internal Solid State Drive (SSD)
CCL Computers AMD
250GB Lexar NM610 M.2 2280 PCI Express NVMe 3.0 x4 Solid State Drive