What security measure aims to protect manual file systems from unauthorized access?

Shredding sensitive documents is a security measure specifically designed to protect manual file systems from unauthorized access by physically destroying documents that contain confidential or sensitive information. By shredding these documents, an organization ensures that even if unauthorized individuals gain access to the paper records, the information cannot be reconstructed or read. This practice mitigates the risk of data breaches and identity theft related to physical documents.

In contrast, the other options focus on digital environments or do not directly address manual file systems. Firewalls primarily protect networks and digital data from unauthorized access and attacks. Encrypting digital files secures information in electronic formats, making it unreadable without the proper decryption key, but does not apply to physical documents. Implementing password protection secures access to specific digital systems or files, but does not pertain to the protection of physical manual file systems. Consequently, shredding sensitive documents is the most appropriate measure for safeguarding manual records against unauthorized access.