USB 2.0 is backwards compatible with USB 1.1.

Later, the USB Promoter Group increased the rate to 480Mbps in October 1999, which is 40 times faster than the traditional USB 1.1. Generally, manufacturers call its products that comply with the USB 1.1 standard 'full-speed USB.' When the high-speed USB 2.0 was first introduced, the highest transmission rate was only 240Mbps.

The traditional maximum transfer rate of USB 1.1 is 12Mbps. USB also includes the old USB 1.1 standard and USB 2.0 standard. Now many high-speed U disks or mobile hard drives use USB 3.0 or USB 3.1. The maximum transmission bandwidth of USB 3.0 is up to 5.0Gbps (640MB/s). The biggest difference among them is speed, that is, they indicate the speed of USB transfer files. The USB 1.0/2.0/3.0 we often say refers to the technical specifications. USB chargers, USB connectors, and USB cables are all USB the same? What is USB 2.0 and USB 3.0? What is a low speed, full speed, and high speed? What are Type-A, Type-B, and Type-C? Here you will get a full answer. These USB devices give us great convenience. Our mobile phone charging uses the USB connector. The USB interface has hot-swappable, plug-and-play functions, and can be connected to a variety of external devices, such as a mouse and keyboard, etc. It is widely used in information transformation products such as personal computers and mobile devices. USB is a universal serial bus standard and a technical specification for input and output interfaces. Look at your computer or smartphone, we probably know what it is used for, however, fewer people know the full name of USB and the real meanings of USB standards and USB types. USB devices are very important for our life. In modern tech life, you can always see one or more USB ports on virtually desktop computers, laptops, TVs, game system devices, cars, media players, and other devices, etc. USB is very common because it is indispensable for data transmission and charging.

Usb 2 vs usb 3 ports