USB 3.0 is the next major revision of the ubiquitous Universal Serial Bus USB 3.0 it achieves a much higher performance by way of a number of technical changes.
Perhaps the most obvious change is an additional physical bus that is added in parallel with the existing USB 2.0 bus. This means that where USB 2.0 previously had 4 wires (power, ground, and a pair for differential data), USB 3.0 adds 4 more for two pairs of differential signals (receive and transmit) for a combined total of 8 connections in the connectors and cabling..
More power-hungry devices could be bus powered, and battery powered devices that previously charged using bus power could potentially charge more quickly.A new Powered-B receptable is defined with two extra contacts that enable a devices to provide up to 1000 mA to another device, such as a wireless USB Adapter.
This eliminates the need for a power supply to accompany the wireless adapter coming just a bit closer to the ideal system of a wireless link without wires (not even for power). In regular wired USB connections to a host or hub, these 2 extra contacts are not used.
USB 3.0 utilizes a bi-directional data interface rather than USB 2.0's half-duplex arrangement, where data can only flow in one direction at a time. Without getting into any more technical mumbo jumbo, this all combines to give a ten-fold increase in bandwidth.
This is especially good for external Hard Drives with USB 3.0, the speed of transfer will be greatly improved.
I just bought a USB 3.0 PCIE card that fits into those small PCIE ports in your computer that no one ever used ..They are relatively inexpensive and easy to install. You can get one at any online computer store like Tigerdirect.ca or NCIX.com then you will be ready for the next generation of USB devices