Boot Windows and use Disk Management ( diskmgmt.msc ) to "Extend Volume" into the newly unallocated space.
as normal.
QCOW2 files often grow larger than the data they contain because Windows doesn't automatically "unmap" deleted blocks from the host. How to Tune QEMU L2 Cache Size and QCOW2 Cluster ... - IBM windows 8 qcow2
Windows 8 is no longer supported by Microsoft (mainstream support ended in 2018, extended support until 2023). Using it without a valid license remains copyright infringement. The QCOW2 format itself is open source and legal. Boot Windows and use Disk Management ( diskmgmt
: Unlike "raw" images that occupy their full size immediately, a Windows 8 QCOW2 file starts small and grows only as data is written by the guest OS. How to Tune QEMU L2 Cache Size and QCOW2 Cluster
To clone your Windows 8 image and reclaim unused space: