Western Digital WD PC SN720 NVMe SSD - Solid state drive - 512 GB internal - M.2 | eBay
250GB - WD Black M.2 Internal SSD Solid State Drive – SimplyNAS
Amazon.com: OEM OEM Western Digital PC SN730 NVMe SSD 512GB Capacity Read speeds up to 3,400MB/s, Write Speed up to 2,1002MB/s Available in M.2 2280 Form Factor Endurance of up to 400