The 500GB System File That Eats Hard Drive on Windows 11

My Windows 11 computer has a single, mysterious system file that is consuming nearly 500 gigabytes of storage space on my hard drive, and I cannot figure out what this file is, where it came from, or whether it is safe to delete, but it is eating up so much room that I am constantly running out of space for my actual programs and personal files. I have already tried using Disk Cleanup, running antivirus scans, and checking for old Windows update files, but nothing has identified or removed this massive file, so I am hoping someone can help me track down its location and determine if it is a corrupted system file, a misbehaving backup, or some kind of malware hiding in plain sight.