What is a pen drive?

A pen drive is another name for a USB flash drive. Other names are Flash drive, USB flash drive, Thumb drive, etc. They are devices that allow storage of computer files that you can remove and take from computer to computer. The price of the drive is determined by the size of its memory measured in megabytes or gigabytes. While 128 megabyte drives used to be considered large, current pen drives sizes can reach 1, 2, 4, or more gigabytes. The drives are inserted in the computers USB ports and are automatically recognized on PC operating systems beyond Windows 98 (which needs a separate installation of drivers). Pen drives can also have full blown applications on them which are written in what is called U3 compatible software.