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I have a collection of *.jpg files and intend to do some ImageMagick on them.

Making a backup and checking, du -sh gives 762M on vfat and 5.6G on exfat.

Why is that? Is it a bug or a feature?

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  • You have a lot of hard links? Commented Aug 13 at 19:04
  • @muru No, just plain files. Commented Aug 13 at 19:06
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    file system block size is not the same as the block device block size (e.g. ext4 usually / almost always uses 4096, even if the underlying media has a block size of 512) Commented Aug 13 at 19:59
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    Possible duplicate of Why are there so many different ways to measure disk usage? Commented Aug 13 at 20:16
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    @DavidG.Bingo, this "reduces" the displayed size from 5.6G to 717M. But, still, I lack understanding and I fear that the difference is somehow used up and not available. Commented Aug 14 at 6:39

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