Things You'll Need
Instructions
Turn off your PSP, insert the Memory Stick Duo, and turn the PSP back on again.
Push the analog stick on the PSP to the left and stop on the "Settings" menu.
Scroll down and press "X" over "System Settings."
Scroll down to the "Format Memory Card" option and press "X" once. Press "X" over the "Yes" option to confirm the formatting of the memory card. The memory card is now set up for use.