A disk is a small round object or a flat, circular plate. It can refer to various things such as a computer storage device, a part of a wheel, or even a type of round-shaped food like a pizza or a cookie. Full definition
The virus did wipe out contents of hard disks of the infected computers. (religion-online.org)
There's no need to waste 4 GB of hard disk space «just in case». (howtogeek.com)
You can also upgrade the vehicle to include a hard disk drive for local file storage, satellite radio and a DVD entertainment system. (driveclassichonda.com)