Modern flash drives have USB 2.0 connectivity. However, they do not currently use the full 480 Mbit/s the specification supports due to technical limitations inherent in NAND flash. The fastest drives currently available use a dual channel controller, although they still fall considerably short of the transfer rate possible from a current generation hard disk, or the maximum high speed USB 2.0 throughput.
Typical overall file transfer speeds are about 3 Mbytes/s. The highest current overall file transfer speeds are about 10-25 Mbytes/s. Older, "full speed" 12 Mbit/s devices are limited to a maximum of about 1 Mbytes/s.
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