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Hard Drive Questsion

So I currently have a 750GB Hard Drive in my computer and I am thinking about upgrading to an SSD but I need to know how big of a SSD I need, but when I go to Start Menu>Computer it shows me that I only have 698GB total of Hard Drive space but my Hard Drive is a 750GB, so does the operating system take up that 52GB and windows just doesn't display it?
Thanks!!!
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  1. Best answer
    You are best off with a 120/128Gb SSD or larger, although I have several systems on 80Gb SSDs that contain Win7 and all my programs.

    The prices have really come down and they are less than $1/Gb on sale.

    Optimized, Windows 7 takes up about half of that 52Gb number. My current SSD has 76Gb including the OS, many programs and games and all my documents.
  2. Microsoft and memory RAM manufacturers calculate 1 Gigabyte as 1,073,741,824 bytes.

    Hard drive and SSD drive manufacturers calculate 1 Gigabyte as 1,000,000,000 bytes.

    The difference between the two methods is 7%. 7% of 750 is 52.

    So whenever you buy a HDD or SSD there will always be a 7% between what's advertised by the drive and what's available in Windows.
  3. Dereck47 said:
    Microsoft and memory RAM manufacturers calculate 1 Gigabyte as 1,073,741,824 bytes.

    Hard drive and SSD drive manufacturers calculate 1 Gigabyte as 1,000,000,000 bytes.

    The difference between the two methods is 7%. 7% of 750 is 52.

    So whenever you buy a HDD or SSD there will always be a 7% between what's advertised by the drive and what's available in Windows.

    It says that I have 540GB's free of 698GB's so that means that I have taken up 158GB's of space on the hard drive including windows?
  4. Yup, including all the extra space that Windows consumes for hibernation, paging files, caches/temp files, etc.
  5. coper210 said:
    It says that I have 540GB's free of 698GB's so that means that I have taken up 158GB's of space on the hard drive including windows?


    Correct. Windows 7 including all of the Service Packs and updates takes from 19-20GB. So the remaining 138GB must be programs/games/media that you installed.
  6. Best answer selected by coper210.
  7. coper210 said:
    So I currently have a 750GB Hard Drive in my computer and I am thinking about upgrading to an SSD but I need to know how big of a SSD I need, but when I go to Start Menu>Computer it shows me that I only have 698GB total of Hard Drive space but my Hard Drive is a 750GB, so does the operating system take up that 52GB and windows just doesn't display it?
    Thanks!!!


    The correct answer to your question is given by kenji57_? on:
    http://forums.seagate.com/t5/Other-External-products/Seagate-expansion-750GB-shows-only-698GB-available-out-of-698GB/td-p/182210

    "People count in decimal, computers count in binary.

    So we say a Gigabyte is 1000 x 1000 x 1000 Bytes.
    750 Gigabytes = 750,000,000,000 Bytes

    For a computer 2^10 =1024 = 1kiloByte
    and a computer Gigabyte is 1024 x 1024 x 1024 Bytes

    so 750,000,000,000 Bytes ÷ 1024 ÷1024 ÷ 1024 = 698 computerGigabytes. Your drive still holds 750,000,000,000 Bytes, but your computer calls that 698GB"
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