What is a USB flash drive?

U disk is the abbreviation of USB (universal serial bus) disk, which is also called "USB flash drive" according to homophonic. U disk is a kind of flash memory, so it is sometimes called flash disk. The biggest difference between U disk and hard disk is that it does not need physical drive, plug and play, and its storage capacity far exceeds that of floppy disk, so it is very convenient to carry.

U disk integrates disk storage technology, flash memory technology and universal serial bus technology. The port of USB is connected with the computer and is the channel of data input/output; The main control chip allows the computer to recognize the U disk as a mobile disk, which is the "brain" of the U disk; The flash memory chip of a U disk stores data, which is different from the memory of a computer. Even if the power is cut off, the data will not be lost. The PCB backplane connects all components together and provides a data processing platform.