Massive capacity.WD leads the way; pioneering capacity to deliver a massive 3 TBs of storage on a single drive. Reduced power consumption.Reduced power consumption makes it possible to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation. Cool and quiet.WD GreenPower Technology yields lower operating temperatures for increased reliability and low acoustics perfect for ultra-quiet PCs and external drives. Did you know...It's easy to install an internal hard drive in your computer. The world's largest capacity internal hard drive.WD Caviar Green SATA drives now deliver up to a massive 3 TB's of storage on a single drive. IntelliSeek.Calculates optimum seek speeds to lower power consumption, noise and vibration. Advanced Format (AF).Technology being adopted by WD and other drive manufacturers as one of multiple ways to continue growing hard drive capacities. AF is a more efficient media format that enables increased areal densities. IntelliPower.A fine-tuned balance of spin speed, transfer rate and caching algorithms designed to deliver both significant power savings and solid performance. Additionally, WD Caviar Green drives consume less current during startup allowing lower peak loads on systems as they are booted. Ideal for:PCs, external storage and other devices that require lower power consumption and cool, quiet operation. Desktop / Consumer RAID Environments - WD Caviar Green Hard Drives are tested and recommended for use in consumer-type RAID applications. (RAID-0 / RAID-1) Perfect for external drives.External drive manufacturers can eliminate the need for a fan in a high-capacity product by utilizing the cool and quiet operation of WD Caviar Green hard drives. NoTouch ramp load technology.The recording head never touches the disk media ensuring significantly less wear to the recording head and media as well as better drive protection in transit.