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Windows 7: What's the diffrent between "size" and "size on Disk"?


25 Dec 2010   #1

windows7 Ultimate SP1 x32bit
 
 
What's the diffrent between "size" and "size on Disk"?

Hello!
When i check folders properties i can see this "Size" and "Size on Disk". Both fields are show same amount so what is the different between that?




My System SpecsSystem Spec
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25 Dec 2010   #2

Windows 7 Ultimate SP1 x64
 
 

Size is the actual size of the file in bytes.
Size on disk is the actual amount of space being take up on the disk. the disk is broken down into tracks and sectors.
Look Here
My System SpecsSystem Spec
25 Dec 2010   #3

Windows 8.1 Pro (x64)
 
 

Size on disk refer to how much clusters it is using. By default Windows 7 uses a 4KB cluster size. So if you create a new text file and type a single character into it. Looking at its properties would show: "Size: 1 bytes; Size on disk: 4 KB" Even tho that file is just 1 byte it takes up 4 KB.
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 What's the diffrent between "size" and "size on Disk"?




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