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  1. #1
    Junior Member HghgGhghhg's Avatar
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    Why does a DVD you buy have more storage than 4.7GB ?

    When you buy a DVD it has 4.7GB

    But if you buy a game like Black Ops it has about 8 GB on the DVD.

    How ?

  2. #2
    Junior Member gospieler's Avatar
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    A standard DVD has a single layer 4.7 GB disc, commercial DVD has more than one layer.

    "In DVD recording, a standard, single layer, 4.7 GB disc holds up to 2 hours of video at DVD quality. All commercial movie DVDs hold about 5GB per layer - which each layer holding about 133 min. If you buy a movie DVD that has a 2 hour movie, plus an hour or so of extra features, this means that the disc has more than one layer. Some DVDs are also dual-sided.
    All currently available DVD players and recorders can play back commercial discs with more than one layer. However, some older players (pre-1999) may not be able to in all cases. "

  3. #3
    Junior Member HyunLee's Avatar
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    Just speaking in general about DVD's here.
    Double layer DVDs can hold about 8.7GB of data.
    A single layer has 4.7GB.

    You can usually buy either at shops.
    Some games discs use dual layer for its bigger capacity.

    Also, in some cases, files are compressed to a large extent on discs.

  4. #4
    Junior Member omg_ct's Avatar
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    single layer dvd's are 4.7gb, and dual layers are 8.5gb, you can buy dual layers from any computer store

  5. #5
    Member Vomit's Avatar
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    Because a DVD-R and a commercial DVD are not the same thing. A commercial disc is dual layer. A DVD-R is not unless you specifically buy a dual layer DVD-R (or DVD+R).


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