If your PSP 3000 is not detecting your Memory Stick, here are some possible reasons and solutions:
1. Dirty or Faulty Memory Stick
Solution: Remove the memory card and clean the gold contacts with a soft cloth.
Try inserting it again. If it still doesn’t work, test it on another PSP or a card reader to see if it’s faulty.
2. Incorrect Format
Solution: Your PSP may not recognize the memory card if it's not formatted correctly.
Go to Settings > System Settings > Format Memory Stick and format it using your PSP.
3. Fake or Unsupported Memory Stick
Some cheap memory sticks (especially high-capacity ones) may not be compatible with PSP.
Solution: Use a genuine Sony Memory Stick Pro Duo or a trusted brand like SanDisk.
4. Loose Connection or Damaged Slot
Solution: Insert and remove the memory card a few times to check if it makes proper contact.
If the memory card slot is dirty, blow some compressed air into it.
5. Custom Firmware (CFW) Issues
If you are using custom firmware (CFW), some settings may cause detection issues.
Solution:
Boot into the Recovery Menu and check Advanced > Format Memory Stick.
Try resetting the PSP settings (Settings > System Settings > Restore Default Settings).
6. Outdated Firmware
Older firmware versions may have bugs affecting memory stick detection.
Solution: Update your PSP firmware to the latest version via Settings > System Update.
If none of these work, your memory card or PSP slot may be damaged. Try using a different memory card or seek repair
assistance. Let me know if you need more details!