Capacity: 1TB storage. Interface: SATA 6Gb/s. Cache: 64MB buffer. RPM: 5400 RPM. Reliability: Designed for continuous use, up to 180 TB/year workload rating.

TOSHIBA S300 1TB 3.5 inch Surveillance Internal Hard Drive – SATA 6 Gb/s 5700 RPM 64 MB Cache