Blu-ray, also known as Blu-ray Disc (BD) is the format developed to enable recording, rewriting and playback of high-definition video, as well as storing large amounts of data. It is developed by the Blu-ray Disc Association, a group of the world's leading consumer electronics, personal computer and storage media manufacturers.

All major capacity of Blu-ray disc

• For single-layer disc - 25GB.
• For dual-layer disc - 50GB.
• Also supports multi-layer discs

The main Advantages of this BD

• Record HDTV without any quality loss
• instantly skip to any spot on the disc
• record one program while watching another
• create playlists
• edit or record programs recorded on the disc
• automatically search for an empty space on the disc to avoid recording over a program
• access the Web to download subtitles and other extra features

This Standard and next-generation optical disc format, also known as Blu-ray Disc (BD). Advanced and effective storage media has a storage capacity of 25GB on a single-layer disc and 50GB on a dual-layer disc. While DVD, DVD-R, DVD+R rely on a red laser to read & write data, This secondary storage device uses a blue-violet laser instead.

The benefit of using a blue-violet laser (405nm) is that it has a shorter wavelength than a red laser (650nm), which makes it possible to focus the laser spot with even greater precision. This allows data to be packed more tightly and stored in less space, so BR-D can fit more data even though it's the same size as a CD/DVD.