QEMU Copy-On-Write version 2 is a disk file format that represents a virtual hard drive. Unlike a raw .img file which allocates the full size immediately (e.g., 20GB instantly taken from your SSD), a Qcow2 file grows dynamically.
Benefits for Windows XP:
If you want, I can provide:
Related search suggestions: (windows xp qcow2, qemu windows xp install, virtio drivers xp)
One Qcow2 file is not locked to QEMU. You can use it elsewhere:
qemu-img snapshot -a "before_activation" windows-xp.qcow2