The data displays global shipment figures for hard disk drives since the fourth quarter of 2010. In the second quarter of 2018, 95.25 million hard disk drives were shipped worldwide. A hard disk drive (HDD) is a data storage device which is used for storing and retrieving digital information. It is a form of non-volatile memory, meaning that it retains its data even when unpowered. The technology was first introduced by IBM in 1956 and it has been the dominant secondary storage device for general-purpose computers since the 1960s.
