Maximize your performance with this internal 1 TB SSD drive. This model has an M.2 form factor.
From Amazon
WD Blue 3D NAND Internal SSD M.2 SATA - 1 TB, Blue - High Performance
OnBuy
Western Digital 1TB WD Blue 3D NAND Internal PC SSD - SATA III 6 Gb/s, M.2 2280, Up to 560 MB/s - WDS100T2B0B
EE Store
WD 1TB Blue 3D NAND SATA 6GB/s M.2 2280 SSD