Instructions
Locate the Sony PlayStation Portable memory card slot. This slot is located on the left side of the system's case. It is protected by a tiny removable cover.
Use your finger to pull off the cover that protects the Sony PSP's memory card slot. This will reveal the entire slot as well as any memory card that is currently inserted. You can push down on a memory card that is already inserted to eject it, or push a new card into the slot to properly insert it.
Replace the cover to the PSP's memory card slot. Doing so will not only protect the memory card itself, but also protect the slot from getting dirty or dusty, which will cause problems with the device.