Features:
1.USB 3.0 takes the data rate to a new theoretical maximum of 5Gbps.

2.Unlike previous versions where data can only be piped in one direction at a time, It can read and write data
simultaneously.

3.It is more power efficient. Minimum device operating voltage is dropped from 4.4V to 4 V. On the other hand,
the maximum bus power output from about 500 mA to 900 mA.

4.It  is backwards compatible. Your existing USB 2.0 gear will work on version 3.0 ports and vice versa.