Gizmodo 
Oct 5, 2007 10:17 AM
912
Although 200GB storage discs for Blu-ray have been out and about for a while, no player can actually read them. However, Hitachi's just raised the bar of practicality (as opposed to the bar of numbers on a spec sheet) to 100GB. These discs will work in existing players without the need to update your firmware. Good news for storage heads, but for most people it just means Blu-ray movies will have 70GB of empty space on them instead of 20GB (most movies don't need 50GB even with extras). [idm.net.au]
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