To manage your network security effectively, it helps to decode the Fortinet naming convention:
# Inspect virtual size and actual disk usage qemu-img info Fgt-vm64-kvm-v7.2.3.f-build1262-fortinet.out.kvm.qcow2 Fgt-vm64-kvm-v7.2.3.f-build1262-fortinet.out.kvm.qcow2