A network-attached storage (NAS) device stores files in a form which is accessible over a network. They typically consist of a specially designed computer without display or keyboard, containing one or more hard drives and running an operating system designed specifically for the management and administration of those files. In the home, NAS devices are often used to store files which are intended to be shared between a number of computers, mobile devices or media playback devices, such as connected TVs and music systems.