hiberfil.sys what is it and can I get rid of it?

Using space sniffer hiberfil.sys comes up at 4gb per partition of my triple boot system (win 8.1 x86, win xp and win 8.1 x64). I dont hibernate and it is off in settings or says "never" so why do I have a hibernate file? Also AppData seems to be large at 5 gb anything in there to delete? My Win 8.1 x86 partition is consuming 97 gb of 133. I need to trim some files.

Tim

Hello Tim,

The hiberfil.sys file is what is used by hibernate and fast startup. If you like, you can disable hibernate to remove the hiberfil.sys file and free up the space. You just will not be able to hibernate the PC or use Fast Startup with it disabled though.

Hibernate - Enable or Disable - Windows 7 Help Forums