Memory Stick errors
Memory Stick Errors
The PSP reports the Memory Stick is unreadable, prompts to format it repeatedly, loses files after a session, or refuses to save data.
Common Causes
- Filesystem corruption. Removing the stick during a write or a sudden power loss damages the FAT structure.
- Wrong format. The PSP expects FAT32; exFAT or NTFS will not mount.
- Counterfeit or failing card. Fake high-capacity sticks report false sizes and corrupt data once real space fills.
- Dirty contacts. Oxidized pins cause intermittent read failures.
Fixes
- Back up any recoverable files, then format the stick as FAT32 using the PSP's own Settings menu for best compatibility.
- On a computer, run a disk check or full reformat to FAT32 if the PSP cannot complete the format.
- Verify true capacity with a card-test utility; if it reports fake size, replace the card.
- Gently clean the metal contacts with isopropyl alcohol and reseat firmly.
Always use the PSP's USB mode or a safe eject before pulling the stick. Yanking it mid-write is the top cause of corruption.
Note Keep a periodic backup of your SEPLUGINS, ISO, and save folders so a corrupt card never costs you your setup.