modern pen drive collection
A USB flash drive consists of a flash memory data storage device integrated with a USB (Universal Serial Bus) interface. USB flash drives are typically removable and rewritable, and physically much smaller than a floppy disk. Most weigh less than 30 g.

Flash memory combines a variety of mature technologies, with lower costs, lower power consumption and small size made ​​possible by advances in microprocessor technology. The memory storage was based on earlier EPROM and EEPROM technology.

Design and Implementation
One end of the device is equipped with a single male type-A USB connector.