What is the primary function of a USB Data Blocker?

A USB Data Blocker serves the primary function of preventing unauthorized access to data when connecting USB devices. It is designed to allow power to flow between devices—enabling them to charge—without permitting data transfer. This is particularly useful in public or potentially insecure environments, where connecting devices could expose them to data theft or malware.

The core purpose of a USB Data Blocker lies in its ability to create a secure environment when charging devices, thus mitigating risks associated with data leaks or unauthorized access. It acts as a safeguard, allowing users to power their devices while keeping sensitive information secure.

The options related to enhancing charging speed, encrypting files, or transferring data securely do not align with the specific safety features that a USB Data Blocker provides. The device does not perform any of those additional functions but is specifically focused on creating a protective barrier against data risks during the charging process.