Toshiba 4.0TB MD04ACA400 SATA 6.0Gb/s 7200rpm Internal Hard Disk Drive One Terabyte Per Platter Technology Toshiba's 7200 RPM 3.5-inch (8.9cm) HDD series (formerly HGST DeskstarTM) is optimized for use in power-friendly consumer and commercial desktop computers, gaming PCs and external HDDs. The MD04ACA series offers up to 5 TB capacity and uses Advanced Format and leverages a best-in-class power management technology. Power-efficient Performance In addition, this desktop drive provides up to 16% idle power savings over the previous model. The SATA 6.0Gb/s interface drives deliver 7200 RPM performance. These HDDs are designed to allow manufacturers to leverage the benefits of the latest components and operating systems to deliver high-performance, high-capacity, power-efficient systems. Advanced Format Technology Advanced formatting optimizes hard drives to take advantage of the capabilities of newer operating systems. This capability enables hard disk drive manufacturers the ability to design larger capacity hard drives, now and into the future.