BD

I'm not goin to write about Business Delegate pattern... by BD here I meant the NeXt Generation optical disc format : Blu-ray Disc.
If you are having 4 GB or 5 GB HD throw it off... switch to Blu-ray Disc. A single layer Blu-Ray disc can hold 25 GB.

Blu-ray Disc format was developed by BD Association which includes all major consumer elctronics, PC and media manufactures. Hopefully BD will replace DVD in a short time.
For more info about BD visit : http://www.blu-ray.com/info/