This compact and versatile NAS is the world's first M.2 SSD NAS with a built-in hardware-based network switch, being able to accommodate up to 4 M.2 SSDs and featuring a quad-core Intel processor.
http://www.notebookcheck.net/QNAP-TBS-453A-M-2-SSD-NASbook-now-available.161925.0.html