Things You'll Need
Instructions
Push the "Home" button on your PSP to load the "Home" menu.
Select the "Game" icon.
Insert a Memory Stick Duo into the Memory Stick slot on your PSP.
Select the "Memory Stick" icon from the menu.
Press the triangle button to display the "Options" menu.
Choose "Information" in the "Options" menu.
Read the information in this menu to find out how much free space is available on your Memory Stick Duo.