This is a rather simple green IT product that is green in the sense that it might help you extend the life of an old hard drive. And you all know that data storage is just one of those things that we can't seem to get enough of.
The CDD2000 USB 3.0 Hard Drive Docking Station from Cirago International is a SuperSpeed USB 3.0 gadget that serves (as you might expect) as a plug-and-play home base for 2.5-inch and 3.5-inch SATA I and II hard drives. The idea is that you can upgrade your computer while still having access to all the stored data. You can think of it as "recycling" your hard drive, and with a retail price of just under $50, it's certainly not all that cost-prohibitive.
The technology DOES require USB 3.0 support in order to work at its optimum capacity, but it is backwards compatible with USB 2.0 and USB 1.1.