The QNAP TS-451U is a high-performance NAS storage device suitable for small and medium-sized businesses. This model supports HDD drive types and comes with 1GB RAM. However, it does not include caddy or HDD. With its powerful processor and advanced features, the TS-451U is capable of providing reliable and secure storage for your business data. It also supports various applications and services such as file sharing, backup, and virtualization. Upgrade your storage system with the QNAP TS-451U NAS storage today.