I have a storage problem on my ps3. This ps3 is a 20 gb but on the system information it says i have 5400mb (rounded)/ 18gb. I understand the 18gb because sony rounded the gigabytes to 20gb and is a complicated number and its the same thing for my ipod gb too but why do i have only 5.4 gb of storage when i all have is save files? I have no music, videos, pictures, and 0 demos. All i have on my ps3 is save files and friends.