For some reason, I struggle to understand this sentence. Do you mind to elaborate?You might want to move you're swap file to a different drive, that will free up space on you're C: drive.
I never had access to hibernation on this machine. Even the settings are not available.And disable the hibernation file (which can only go on the C:\ drive). You lose hybrid sleep, but you'll gain the same amount of space on your drive as you would RAM you have, so 8/16GB.
But my drive has a second partition, "D: Recover". It's about 25 GB tall.