Maximum Capacity of Official PSP Memory Cards: 16 GB Memory Stick Pro Duo

The largest official Sony Memory Stick Pro Duo for PSP is 16 GB. Earlier capacities included 1 GB, 2 GB, 4 GB, and 8 GB.

Important Notes

• SD Card Adapters: You can use microSD cards via an adapter (especially on PSP Go), allowing larger capacities unofficially.
• Unofficial/Modded Cards: Some third parties claimed higher capacities, but they are often unreliable and not endorsed by Sony.

For guaranteed compatibility, stick to official 16 GB Memory Stick Pro Duo cards.