brand new unused The DELL 91K8T 3TB 7.2K RPM SAS 3.5" Constellation ES.2 with Caddy is an internal desktop drive designed for high storage capacity and speed. With a rotation speed of 7200RPM, this SAS interface drive offers reliable performance for desktop computers and servers. The Dell Constellation product line ensures quality and durability, making it an excellent choice for storage-intensive tasks. The included caddy also allows for easy installation and maintenance, making it a convenient addition to any storage setup.