YouTube - Patron Perks - Books - Ask - About
Disc, spelled with a c and not a k, specifically refers to optical media.
CD, DVD, and Blu-ray technologies are all optical storage mechanisms that use lasers of one form or another to read from their corresponding media. As a result, those media are most properly referred to as discs, not disks.
The term “disk” is then reserved for everything else – most commonly, magnetic media such as hard disks.« Back to Glossary Index