Once Windows is installed, the true power of QCOW2 shines. Before installing drivers or heavy software, you can create a snapshot via the QEMU monitor console:
(20β64 GB):
qemu-system-aarch64 \ -M virt,highmem=off \ -cpu host \ -smp 4 \ -m 4096 \ -bios QEMU_EFI.fd \ -device virtio-gpu-pci \ -device qemu-xhci \ -device usb-kbd \ -device usb-mouse \ -device virtio-serial-pci \ -drive file=win10-arm64.qcow2,if=virtio,cache=writethrough \ -drive file=/path/to/Win10_ARM64.iso,if=virtio,media=cdrom \ -nic user,model=virtio-net-pci
Check actual disk usage:
