With the continuous popularization of USB flash disk, USB is widely used in life. Compared with Bluetooth and network, USB even has faster transmission speed. We almost choose Bluetooth pairing or remote transmission for files before transmission. With USB, it is much more convenient. The era of high-speed USB3.0 is also coming. How to distinguish whether USB 3.0 high-speed transmission is supported for the new USB flash disk and mobile hard disk? Let’s have a look!
There are three USB interfaces: USB1.1, USB2.0 and USB3.0: theoretically, the transmission speed of USB1.1 can reach 12mbps, and all devices can only share 1.5mb/s bandwidth. If a single device occupies all the bandwidth of the USB interface, it will bring difficulties to the use of other devices. USB2.0 can reach 480mbps and is downward compatible with USB1.1.
USB 3.0, initiated by Intel and other companies, has been updated to USB 3.1 Gen 1 by USB if. It is a new generation of USB interface. It is characterized by very fast transmission rate, which can reach 5Gbps in theory, which is 10 times faster than the common 480mbps USB2.0 universal serial bus. Order: USB 3.0 > USB2.0 > USB1.1
Moreover, the USB transmission is not affected by the network and is only related to itself. For example, the USB flash disk 3.0 is used, but it is plugged into the 2.0 interface. At this time, the speed of the USB flash disk will be downward compatible and reduce to the speed of 2.0. That is to say, when the 2.0 USB flash disk is plugged into the 3.0 interface, the transmission speed is still 2.0. When the 3.0 USB flash disk is plugged into the 2.0 computer, it becomes 2.0 transmission speed.
Differences in shape and structure; USB2.0 adopts 4-pin design, while USB3.0 adopts 9-pin design, which is more powerful than USB3.0. USB3.0 interface is marked with “SS” style, while USB2.0 is only marked with ordinary USB universal identification. There are generally two or more USB interfaces for our notebook computers, and support for USB2.0 and USB3.0 has been provided at the same time. We can distinguish them by interface color.