I recently had built a new server with a 32 GB OS volume, and the system had a considerable amount of RAM. I noticed that I was rather low on disk space but couldn’t find the culprit due to Windows UAC. In doing some digging, I found that hiberfil.sys was consuming over 12GB of disk space. Deleting the file is not as easy as you would think. There is a command that you need to run to disable the hibernation system:
powercfg -h off
This also should make my backups a little faster as well. I hope this helps!