The cassette successor is the DISC, which is a type of optical storage medium. It is a flat, round, portable DISC made of metal, plastic, and lacquer that can store digital data. Discs are used in many consumer electronics, such as computers, video game consoles, and DVD players. They are also used to store music, movies, and other forms of digital media. Discs are more durable than cassettes and can hold more data.