After we have seen Blu-ray and HD DVDs out on the market 500 GB might not seem that much. However, this number is very difficult to achieve by just adding layers and creating new formats. According to last optical disc researches there is a technology that can cram that amount of data on to a usual HD DVD or Blu-ray disc.

“Microholas” project is what they call it, after these researches we will be able to use regular HD DVDs and Blu-ray and record much more information on them. They want to make such discs not just for stacking movies and forgetting about them. It has been created for secured data storage, moreover long term data storage.
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