Synology CS407 NAS is a network attached storage (NAS) device designed for small and medium-sized businesses. It is used to store and manage data, providing users with a secure and reliable storage solution. It features four drive bays that can be used to store up to 12TB of data, and supports multiple RAID configurations. It also has a built-in media server and supports a variety of applications, making it ideal for multimedia streaming, file sharing, and backup. The CS407 also offers advanced security features such as antivirus protection, encrypted network traffic, and intrusion prevention.