Toshiba 1TB SATA 3.5" HDD, 7200 RPM, 32MB cache: The DT01ACA series of 7200rpm 3.5" HDDs is Toshiba's first 3.5" hard drive designed for use in power-efficient desktop and business computers. It is engineered for high performance and low power for cooler operation. These desktop drives have capacities of one terabyte per platter.