To ensure patient confidentiality and privacy, medical records must be stored in a locked, secure system accessible only to authorized personnel. This prevents unauthorized access, tampering, or loss of sensitive information, which is critical for maintaining trust and complying with legal regulations such as HIPAA. Storing records securely also ensures the integrity and accuracy of patient data, which is essential for safe and effective clinical decision-making. Therefore, a locked system is the safest method to protect these valuable records from breaches.

Reference: Principles of Medical Ethics, Beauchamp & Childress, 8th Edition.