CrystalDiskMark is a useful benchmark to measure theoretical performance levels of hard drives and SSD’s. For this test, we are using V5.1.1.
The overall performance here is strong with speeds that would rival many internal SSDs. We ran the test multiple times and the results remained consistent throughout, which is a good sign of performance reliability.
..Or just get the StarTech.com USB 3.1 (10Gbps) Gen2 enclosure for £20 @ Amazon and stick a Toshiba Q300 480GB SSD in there and save yourself £120 with similar performance.
Enclosure: http://www.amazon.co.uk/gp/product/B00XLB0NWK
SSD: http://www.amazon.co.uk/Toshiba-480GB-Solid-State-Drive/dp/B011MFGU7S