Have this chic fast 2.5 "HD bought as an extension for my laptop. She was recognized by Win 8 64 bit immediately and provides a very high data transfer rate Thank USB 3.0 port. 5 Gb were transferred in just 40 seconds and the equivalent of 120 Mb per second. The HD is also very quiet in operation and delivers even with USB 2.0 connection offers fast data rates. Good part that deserves a strong buy recommendation.