USB Flash Drive + A USB flash drive is a data storage device
that includes flash memory with an integrated Universal Serial
Bus (USB) interface. USB flash drives are typically removable
and rewritable, and physically much smaller than a floppy disk.
Most weigh less than 30 g. As of September 2011[update] drives
of up to 256 gigabytes (GB) are available. Storage capacities as
large as 2 terabytes are planned, with steady improvements in
size and price per capacity expected. Some allow up to 100,000
write/erase cycles, depending on the exact type of memory chip
used, and a 10 year shelf storage time.