Grab the WD Scorpio Blue 640 GB 5400 SATA notebook hard drive for $119.99 (20% off).  It is the Amazon Gold Box Deal of the Dayfor Sunday, October 18, 2009.

Check it out:  Amazon Gold Box Deal of the Day

Description:

The new WD Scorpio Blue 640 GB 5400 RPM hard drive offers the highest capacity available for laptops in a single internal SATA 2.5-inch hard drive. Featuring a 9.5 mm height, it is also compatible with most laptops. WD Scorpio Blue drives are designed with ruggedness, reliability, and data-protection features that actively watch over your valuable data. With 30% greater power savings than previous generation drives, the 2.5-inch WD 640 GB Scorpio Blue allows you to enjoy massive capacity and more battery life in a single upgrade!