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I created one APFS Container for the whole of my external hard drive.

I created several volumes in that - some with quotas.

I have now discovered that one quota is now too small. I used diskutil apfs list /dev/disk10 to show me the Capacity consumed and the Capacity Quota.

How do I change the quota for an APFS volume under BigSur?

1 Answer 1

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Unfortunately, there is no way to change an APFS reserveSize nor QuotaSize without destroying the APFS volume and recreating it. You can only set these values when adding the APFS volume.

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    I suspect this is true but do you have any source for this?
    – mmmmmm
    May 29, 2021 at 8:23
  • It is true that there's no way to do this with diskutil which means for most people's purposes it's not possible. That said, I do not know is this is truly technically impossible, for some reason, or if it's just that changing these things is a can of worms Apple didn't want to deal with so this functionality is left absent. If you find a way to do it, I'd love to know.
    – Chris
    Feb 18, 2023 at 23:30

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