South Korean manufacturer Samsung has released solid-state drives series 850 Pro and 850 Evo with a capacity of 2 TB. In the UK, new items cost £ 750 ($ 1,166) and £ 637 ($ 990), respectively. The increase in memory did not affect the physical dimensions of the SSD – all the same 2.5-inch metal cases. The maximum read and write speeds of the 850 Evo drive are 540 and 520 MB / s, respectively, while the read and write performance is 98,000 and 90,000 I / O per second. The older 850 Pro model boasts up to 550 MB / s read speed and read performance of up to 100,000 IOPS. Reliability indicators and warranty periods for drives are noticeably different: 150 TB and 5 years for 850 Evo, 300 TB and 10 years for 850 Pro.