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.

Another advantage of optical storage devices is that they are to use, requiring only a standard CD/DVD drive and compatible media.

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.

A laser is used to read and write data on optical storage devices by making tiny, precise marks on the surface of the .

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