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Windows 7: Copied video file larger than original

07 Jan 2018   #1

Windows 7 Ultimate, 64bit
Copied video file larger than original

As far as I understand files that are being copied should remain the same "size" while "size on disk" may change.

I have copied a video from one external NTFS disk to another, that was around 20gb and the copied video was 4mb larger than the original. I am able to play both of the videos without a problem.

Why is the copied file larger if it is supposed to be the same file as the original?

My System SpecsSystem Spec
08 Jan 2018   #2

Windows 10 Pro x64

If you’re asking why are there two listing for file size:

Size: For uncompressed size
Size on disk: For compressed size
My System SpecsSystem Spec

 Copied video file larger than original

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