Windows 7qcow2 [new] -

It is important to address a critical distinction right away:

qemu-img convert -f vdi -O qcow2 source_image.vdi output_image.qcow2 windows 7qcow2

Windows 7 tends to fragment QCOW2 images over time. Reclaim space: It is important to address a critical distinction

: Shutdown the VM and convert the image to a compressed version: windows 7qcow2

qemu-img snapshot -l windows7.qcow2

A QCOW2 file only occupies the space actually used by the guest OS. Even if you allocate a 100GB drive, the initial file might only be 8GB.