From the network disk link.

U disk, also known as USB flash drive, USB flash drive, flash drive, also known as USB flash drive, is a semiconductor storage device that uses Flash memory chips as storage media and has various characteristics such as anti-magnetic, shock-proof, and moisture-proof. , strengthening data security. It is very light in weight, small in size and easy to carry. It is often used after being connected to various devices, and the USB interface is the most common interface. It does not require a driver or external power supply when using it. It is plug and play, supports hot swapping, and has write protection function. USB flash drives are mainly used to exchange larger files between computers that are not connected to the Internet, and can also be used to replace floppy drives on laptops.