Blu Ray is the most recently introduced optical support on the market and thanks to its enormous memory capacity it is used for very high definition videos and for the games of the most famous consoles.
The most common formats are the single layer BD25 which can hold 25 Gb of data and the dual layer BD50 with a capacity of 50 Gb, but there are also even more capacious versions of 100 Gb and 128 Gb.