My hard drive space isn't updating

I just installed loads of games, at least 50 gigabytes worth, and my hard drive space hasn't updated, it claims to have the same amount of free space as before I installed the games, I restarted the computer and it still hasn't changed, how can I solve this?

I am on a Windows 8 Toshiba i7 Laptop

It is the built in hard drive to the laptop, not external.