1. USB connector can be hot swappable: that is, when users use external devices, they do not need to shut down and then turn on the action, but directly plug in the USB when the computer is working.

2. Easy to carry: USB devices are mostly "small, light and thin", which is very convenient for users to carry a large amount of data. Of course, USB hard drive is the first choice.

3. Unified standards: We are common IDE interface hard disk, serial port mouse and keyboard, parallel port printer scanner, but with USB, these application peripherals can all use the same standard and personal computer connection, then there is a USB hard disk, USB mouse, USB printer and so on.

4. Can connect multiple devices: USB often has multiple interfaces on personal computers, can connect several devices at the same time, if connected to a USB HUB with four ports, you can be connected again; Four USB devices, and so on, can be connected to all your home devices at the same time on a personal computer without any problems.