How much data can be stored on a Blu-ray disc?

A single-layer blu-ray disc will typically have the capacity to hold 25gb. A dual-layer blu-ray disc can hold up to 50gb. To guarantee that the blu-ray design is easily expandable, the medium may permit storage capacities of up to 100-200 gigabytes. A 25gb disk can hold approximately four hours of high definition video or 11 hours of standard definition video.