Pen drive it’s a very common name It looks like small pendent or key ring or bracelet, Most pen drives use a standard USB (Universal Serial Bus) connection allowing plug in into a port on a personal computer.
USB pen drive emulates a small disk drive and allows data to be transferred easily from one device to another.
The way it works is very simple. It also works very fast. It consists of flash memory data storage device integrated with a USB interface. It is typically removable and rewritable. Since it is a relatively new device, Storage capacities can range from 64 MB to 256 GB. It is also called Flash drive. It is an example of EEPPROM memory. The common use of USB pen drive is to transport personal data or store personal files such as documents, pictures and video.