Hi guys, this is my first post here, hoping someone can help. I’m not too knowledgeable of what’s going on in the hard drive. I have 5GB of space left, yet when I check all of my documents, pictures, videos, program files, they only add up to 100GB. The HD is 500GB. I don’t where the other 400 GB is used up? Disk cleanup says I could only save 47MB. Any suggestions would be most appreciated.