A pen drive, or a USB flash drive, is a portable data-storage device. Pen drives have replaced the floppy drives of old and have become the most popular data-storage devices among consumers. Micro, lightweight and handy, a pen drive can be easily carried from place to place by students, professionals, academicians and independent tech consultants. Currently available pen drives with storage capacities ranging from 8GB and 32GB can be used to store graphics-heavy documents, The Pen drive, more commonly known today as a USB drive, serves as a mobile storage for computing systems. Designed off of a non-volatile memory type, these small memory units are praised for their use in small electronics such as cameras and MP3 players. Praised for their solid state nature and ease of mobility, pen drives have become a common and inexpensive form of computer storage.