The MDD 20TB 7200RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal NAS Hard Drive is a high-performance internal desktop drive designed for use in network attached storage (NAS) systems. With a generous storage capacity of 20TB and a fast rotation speed of 7200 RPM, this hard drive offers ample space for storing a large amount of data. The 256MB cache size ensures faster data access and processing, while the SATA III interface allows for reliable data transfer. Featuring a sleek blue color and a form factor of 3.5 inches, this hard drive is a reliable choice for enhancing the performance of your NAS system.