 "Lenovo ThinkPad - solid state drive 512 GB PCI Express 3.0 x4 (NVMe)" " Lenovo (NVMe) 4XB0K48502 Solid State Drives (SSDs) CDW.com
"The ThinkPad 512GB PCIE NVMe SSD with M.2 form factor, high speed with PCIE-NVMe interface , it is the best choice to upgrade your ThinkPad systems." 
 "Transcend SSD370 - solid state drive 256 GB SATA 6Gb/s" " Transcend 6Gb/s TS256GSSD370 Solid State Drives (SSDs) CDW.com
"All the speed is back and even faster. Transcend's SSD370 SATA III 6G/s SSD boasts incredibly fast transfer speeds, large capacities, a compact and lightweight design, shock and vibration resistance, and supports DevSleep mode. That means you can enjoy a seamless, lag-free computing experience even when using your notebook on an extended journey." 