The hiberfil.sys file is a system file created by the Windows operating system. Its primary purpose is to store the current state of your Random Access Memory (RAM) onto your hard drive.
powercfg /h /size <percentage>
However, in Windows 11, the default configuration for hiberfil.sys has changed to accommodate modern hardware. The file is typically sized at approximately . windows 11 hibernation file
: Keeps your session in RAM and uses a tiny amount of power for an instant wake-up. The hiberfil