This is a 4TB security portable SSD made by BUFFALO. Model number: SSDS-PZ4.0EV Additional product information: This external SSD has a 4TB capacity, making it a large-capacity option among external SSDs. Therefore, you can store a large number of files without worrying about running out of space. This SSD also offers high security, allowing you to safely back up important files. It features a virus check function, hardware encryption (AES256bit), and password authentication. In addition, it is designed to be rainproof and dustproof, and has high shock resistance, reducing the risk of physical damage. It is USB bus-powered, and the cable is integrated into the main unit and can be stored.