 "Lenovo - solid state drive 180 GB M.2 Card" " Lenovo Card 4XB0H30209 Solid State Drives (SSDs) CDW.com
"The ThinkPad 180GB M.2 SATA OPAL Solid State Drive is for ThinkPad X1 Carbon, with M.2 (22mm*80mm*73mm) form factor, high speed with SATA 6.0Gbps interface, unique supports X1 carbon." 
 "SanDisk Z400s - solid state drive 256 GB SATA 6Gb/s" " SanDisk 6Gb/s SD8SNAT-256G-1122 Solid State Drives (SSDs) CDWG.com
"The SanDisk Z400s SSD delivers the performance, capacities, and form factors ideal for replacing HDDs in embedded and mainstream computing platforms. It can outperform HDDs by a factor of 20, while providing 5x the reliability at 1/20th the power consumption." 