Things You'll Need
Instructions
Insert your broken PSP memory stick into your PSP and turn on the PSP.
Go into "Settings" on the far left of the PSP main menu and select "System Settings."
Select "Format Memory Stick" from the list that appears. This will wipe the memory stick clean and reformat it in the PSP format.
Select "Yes" from the next page to verify that you want to format the memory stick. Wait as the memory stick is formatted and fixed.
Select "OK" to return to the PSP main menu. Your memory stick is now fixed.