... different standards, USB interface is divided into 1.1, 2.0 and 3.0 standard, is the biggest difference between them transfer rate ... the price is higher than standard hard drive USB3.0 box of 2.0 standard to your 50 yuan, but its performance improvement ... disk data transmission optimization.In order to decentralization version 2.0, USB 3.0 adopted 9 design, and four of them over the ...