Samsung 850 Pro 512GB 2.5-Inch SATA III Internal Solid State Drive for $315.99 shipped.  Here is a screenshot for reference.  It features sequential read and write performance up to 550 megabytes per second (MB/s) and 520MB/s respectively, and random read and write input/output operations-per-second (IOPS) up to 100,000 and 90,000 each, which is at the [...]