The 500GB System File That Eats Your Hard Drive

My Windows 10 computer has a mysterious file that is taking up nearly 500 gigabytes of space on my hard drive, and I cannot figure out what it is, where it came from, or whether it is safe to delete, but it is eating up so much storage that I am constantly running out of room for my actual files and programs. I have already tried using disk cleanup tools and running antivirus scans, but nothing has identified or removed this massive file, so I am hoping someone can help me track it down and determine if it is a corrupted system file, a misbehaving backup, or some kind of malware hiding in plain sight.