Blu-ray Disc is an opticaldisc storage media format and is used like its predecessors (CDR and DVD) for storing data and video.
The name Blu-ray is derived from the blue laser used in the machine. Because of its shorter wavelength (405 nm), more data can be stored on a Blu-ray Disc than on a DVD which uses a red (650nm) laser.
Capacity: 50GB gives up to 270 minutes of recording in HD format of highest quality.
