added games issue

Dec 9, 2010 at 5:05 AM

I have added two games to my 8gb drive why is  only one showing up?

It says there is 3.38 gb used in the left panel but down at the bottom it says all 7.47 gb used 

and Why would two games with the same iso size of 4.38 gb compress to different sizes, one compresses to 3.38 gb and one compresses to 4.08 gb