There are many kinds of Pen drives USB on the market, but most USB flash drives now use the usb2.0 interface, and there are also usb3.0 interfaces, but the price of the usb3.0 USB is relatively high, and there are relatively few users used, so it is possible Many users don’t understand the difference between usb3.0 and usb2.0, the following u start to popularize the difference between usb2.0 and usb3.0, so that if you use a USB flash drive, you will know how to distinguish between usb2.0 and 3.0.