Global hard disk drive (HDD) shipments 1976-2022

In 2022, global unit shipments of hard disk drives (HDDs) were expected to fall to 166 million units, a 36 percent fall from the 259 million units shipped in the previous year. The highest shipment figure was recorded in 2010 where over 650 million units were shipped.

Data storage

Computer memory refers to the physical devices which are used to store data or programs for use in a computer. Primary storage allows for the short-term storage of data: information is retained for immediate use and is directly accessible by the CPU, usually until the main device is reset or turned off.

Secondary storage

Secondary storage, either in the form of HDDs, solid state drives (SSDs), flash drives, or other longer-term storage devices, record and hold data indefinitely, even when the main device is unpowered. A traditional hard drive contains a circular disc, known as a platter, that stores your data. The disc spins, allowing data to be read or written – the faster the platter spins, the faster the hard drive works.