N300 NAS Hard Drive 4TB MN10ADA400ES Features: 3.5" SATA Hard Drive 7200 rpm 512 MB buffer 24/7 operation Supports 1-to-8 bay NAS High reliability and enhanced real-time performance Toshiba Dynamic Cache Technology Toshiba Stable Platter Technology High-endurance design Error recovery control Temperature control 3-year warranty Specifications: Form factor 3.5-inch Interface SATA 6.0 Gbit/s Rotational speed 7,200 rpm Buffer size 512 MB Data transfer speed 281 MB/s Typ. Weight (approx.) 710 g max.