The new reliable nearline model features a top storage capacity of up to 4TB in a 3.5-inch form factor and leading-edge 6GB/sec SATA interface. Intended for 24 x 7 operation, the MG03ACAxxx also includes features that are critical to business operations such as enhanced Error Correction Code (ECC), Anti Rotational Vibration (RV) technology for multi-drive systems, and improved power condition state technology. Toshiba MG03ACA MG03ACA400 4TB 3.5in. Internal Hard Drive is one of many Internal Hard Drives available through Office Depot. Made by Toshiba.