((exclusive)): Fgtvm64kvmv721fbuild1254fortinetoutkvmqcow2

Based on analyzing the string, it seems to combine:

Subject: Write-Up for fgtvm64kvmv721fbuild1254fortinetoutkvmqcow2 fgtvm64kvmv721fbuild1254fortinetoutkvmqcow2

The native virtual disk format utilized by QEMU and KVM hypervisors. Core Use Cases Based on analyzing the string, it seems to

KVM: Specifies the hypervisor. This image is built for Kernel-based Virtual Machine (KVM) environments (common in Linux, Proxmox, and GNS3). 721: Represents the firmware version—FortiOS 7.2.1. Based on analyzing the string

FGT_VM64: FortiGate Virtual Machine for 64-bit x86 architecture.