Blu-ray is a type of optical storage device that is capable of storing larger amounts of data than CDs and DVDs, with capacities of up to GB.

Compared to other types of storage devices, optical storage devices are generally considered to be relatively -effective.

Data on an optical storage device is usually stored in a single spiral track that starts at the center of the and spirals outward to the edge.

Optical storage devices are used in a wide range of applications, from music and to data storage and backup.