Windows not detecting unallocated space after extending virtual disk

You’ve extended a virtual disk in Vmware or Proxmox for a Windows virtual machine, but the disk appears the same size in Disk Management?

Try shrinking the disk a bit—for example, by as few as 2 megabytes. In my case that’s what helped Disk Management suddenly discover new unallocated gigabytes, which I could use to expand the filesystem.

Remember to have a proper backup and do this at your own risk.

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