Maximize your performance with this internal 120 GB SSD drive. The form factor is M.2, which allows the hard drive to connect directly to the motherboard.
From Amazon
Transcend MTS420S 120 GB M.2 2242 SATA III 6 Gb/s Internal Solid State Drive (SSD) 3D TLC NAND (TS120GMTS420S)
Conrad Electronic
Transcend 420S 120 GB SATA M.2 internal SSD 2242 M.2 SATA 6 Gbps Retail TS120GMTS420S
Clove Technology
Transcend M.2 SSD 420S 120GB