ABD-25 is the popular name for a single layerBlu-ray disc. Each layer can hold approximately 25GB of data.

More popular however, is the dual layerBD, theBD-50.

For the future however, there is the possibility of multi-layer discs which would add 25GB capacity per layer.

Due to its large size, 4.5 hours ofHD video and over 12 hours ofSD video can fit on a single layer BD-25.

In comparison, a dual layerDVD can hold up to 8.5GB of data and a dual layerHD DVD can hold up to 30GB of data.

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