A hard disk drive (sometimes abbreviated as a hard drive, HD, or HDD) is a non-volatile data storage device. It is usually installed internally in a computer, attached directly to the disk controller of the computer's motherboard. It contains one or more platters, housed inside of an air-sealed casing. Data is written to the platters using a magnetic head, which moves rapidly over them as they spin. At Vasiti Marketplace, we offer a large selection of External Hard Drives from top brands - Transcend, LG, Seagate, Western Digital & more! Order Now. Nationwide Delivery is available.