What is the definition of a USB flash drive? USB flash drives are external memory devices that connect to a computer through the computer's USB port. They use flash chip technology to store information, and USB flash drives are quickly becoming one of the most popular ways for people to store and transfer data and personal files. But what separates them from other storage devices of the past, such as a floppy disk or a CD?

The most important use of flash drive is the transfer of data. But then a compact disc (CD) or a digital video disc (DVD) also can do the same. Why flash drives? The reason is data on flash drives is rewritable and it is more convenient to carry a flash drive compared to a CD or DVD.