USB flash drive is a portable storage device. It is often the size of a human thumb , and it connects to a computer via a USB port. Flash drives are an easy way to transfer and store information, and they are available in sizes ranging from 2 GB to 1 TB.
A USB flash drive is a data storage device that includes flash memory with an integrated USB interface. USB flash drives are typically removable and rewritable, and physically much smaller than an optical disc. Most weigh less than 30 grams (1.1 oz).[1] As of January 2013, drives of up to 512 gigabytes (GB) were available.[2] A one-terabyte (TB) drive was unveiled at the 2013 Consumer Electronics Show and became available later that year.[3] Storage capacities as large as 2 TB are planned, with steady improvements in size and price per capacity expected.[4] Some allow up to 100,000 write/erase cycles, depending on the exact type of memory chip used, and have a 10-year shelf storage time.[5][6][7]