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  If have a OS that might not have it PowerShell: Import-Module ServerManager Add-WindowsFeature Windows-Server-Backup

  This is from-  https://www.reddit.com/r/homelab/comments/78p8lh/how_to_convert_disk_from_thick_to_thin/ Recently I was need needing to clone a VM and found a way to do it by copying  a VM to another folder and then turning it on which works but the copied VM is Thick Provision on the copy so no good for small lab test environment. So I found this to test. How to convert disk from Thick to Thin provisioned in free ESXi Tutorial I've had a few VMs which had thick provisioned disks instead of thin, as thick is the default this is quite easy to do. If you have the paid version of vSphere and two or more hosts managed by vCenter you can simply do a storage vMotion and change the destination disk to thin. I, like most of the people in this sub, run the free ESXi so this isn't possible. I'll show you how to do it in ESXi via the CLI. I did this on 6.5 but it should work for most versions. Ensure VM you want to convert is powered down. Enable SSH via the GUI ( Host > Manage &g