I was just wondering if it's possible to have different file sizes in different operating systems. Ubuntu shows 47.5gb while Windows was showing 44.2gb. I don't know but I checked each and every file. Nothing is missing but still different sizes. How?

  • Yes, it's certainly possible. One easy way: Different block sizes. – user535733 Apr 24 at 19:09
  • @user535733 Pretty sure it's just an issue of different units. – pomsky Apr 26 at 10:47

It's simply an issue of different units. Windows uses binary prefixes (1024 bytes = 1 kibibyte (KiB), 1024 kibibytes = 1 mebibyte (MiB) etc.) whereas Ubuntu in general uses the metric prefixes (1000 bytes = 1 kilobyte (KB), 1000 kilobytes = 1 megabyte (MB) etc.). Windows also uses "GB" instead of "GiB" and so on.

Thus 44.2 GB in Windows = 44.2 GiB = 44.2×1.024³ GB ≈ 47.4594 GB ≈ 47.5 GB (in Ubuntu), so it adds up.

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