First, there was CDs which offers about 700MB of storage, then DVDs came along which have about 8.5GB of storage, soon there will be Blu-ray discs which offers up to 50GB of storage.
The followup technology to Blu-ray discs, is expected to be Holographic Versatile Disc (HVD). HVD discs can hold up to 1 Terabyte of stoage, which means that you could store a few hundred movies on a single optical disc.
For more information see CNET News.com article "Group aims to drastically up disc storage"
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