Ensure your VM configuration file includes the discard attribute:
A 100GB Windows 10 QCOW2 file only takes up as much space on your physical drive as the data actually written (typically 15-20GB for a fresh install), allowing for better storage density. windows 10qcow2
Start the VM and follow the Windows prompts until you reach . Ensure your VM configuration file includes the discard
You can create the virtual disk using the command-line utility qemu-img . qemu-img create -f qcow2 windows10.qcow2 60G Use code with caution. -f qcow2 specifies the format. windows10.qcow2 is the output file name. windows 10qcow2