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I have an xml file that windows explorer says is 8.00KB on disk, and the size is 25.5 KB.

How is this possible?

I thought the size on disk is in many cases larger than the actual size (because of the block sizes)?

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2 Answers 2

This would happen if you use NTFS compression to compress the file.

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You are correct that the size on disk is normally larger. However, sometimes, due to built in compression, the file is actually smaller on the disk.

Source

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