Instructions
Turn off the Sony PSP by flipping the power switch to the "Off" position.
Locate the port labeled "Memory Stick Duo." It is in the bottom right corner of the backside of the PSP.
Push the port's door open with a finger.
Push on the Memory Stick Duo. The spring inside the port will unlock the Memory Stick Duo. Pull the Memory Stick Duo out and close the port's door.