3 0 hard drive will it work on my computer?
I have a 3.0 USB external hard drive but my older computer is not 3.0. What do I need for my computer to access the faster 3.0 speed?
A USB 3.0 controller card and cable. It uses additional wires over 2.0; nothing can make a 2.0 port run at 3.0 speeds.
Your older computer will access the drive perfectly well, but only at USB 2.0 speeds.
http://www.newegg.com/Product/Product.aspx?Item=N82E16816115105 , as an example, for a full-size machine.
http://www.newegg.com/Product/Product.aspx?Item=N82E16839163001 , as an example, for a notebook.