Reducing a disk assigned to a virtual machine

FabioB

New Member
Jul 19, 2025
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Good morning everyone, and thank you for your interest in my discussion.
I am new to Promox. I installed it (version 8.4) on a new server and created two VMs, using up all the available space. I installed Windows Server 2025 on one VM and Ubuntu Server on the other.
I then realised that I had allocated too little space for the Ubuntu server, while the VM with Windows Server 2025 is now in production and I can no longer delete it.
I know that this issue has already been addressed, but in my research, including in this forum, I haven't understood much.
In short, I would like to reduce the disk with Windows Server 2025, but I have only managed to find a way to increase it, not reduce it. So I kindly ask you to help me understand how I can do this. Thank you and best regards.