Sony OEM Memory Stick Duo PSP-M32 Up To 32MB PSP 1000

Memory Stick Micro SD Adapter for PSP

Micro SD Memory Card Adapter for the PSP Go – Genius Game Mods

16GB Memory Stick Pro Duo (MARK2) for PSP Camera Memory Card

128GB High Speed Memory Stick Pro Duo 128gb for PSP Accessories

Original 128GB High Speed Memory Stick Pro Duo PSP Memory Card Accessories/Camera Memory Stick

Sony PSP 3000 Blue Memory Stick

High Speed Memory Stick Pro-HG Duo 32GB (MS-HX32A) for Sony PSP

For the people with a more purist approach on their PSP's

OEM Memory Stick PRO Duo 1GB 2GB 4GB 8GB Card for PSP Wii - China

2GB PSP Memory Stick Pro Duo (PSP) – J2Games