How to clear Blu-Ray persistent storage
1. Press the Guide button.
2. Scroll to System and press the A button.
3. Scroll to Settings and press the A button.
4. Scroll to Disc & Blu-ray and press the A button.
5. Scroll to Blu-ray and press the A button.
6. Scroll to Persistent storage and press the A button.
7. Scroll to Clear persistent storage and press the A button.