Built for 24/7 surveillanceAllFrame technology for better performanceDesigned to support up to 32 HD cameras3-year manufacturer limited warrantyPackage includes a hard drive only - no screws, cables, manuals included. Please purchase mounting hardware and cables separately if necessarySpecificationLearn more about the Western Digital WD30PURXModelBrandWDSeriesPurpleModelWD30PURXPackagingBare DrivePerformanceInterfaceSATA 6.0Gb/sCapacity3TBRPM5400 RPMCache64MBFeaturesFeaturesBuilt for 24/7 surveillance AllFrame technology for better performanceDesigned to support up to 32 HD camerasUsageFor Video SurveillanceDimensionsForm Factor3.5"Height (maximum)26.10mmWidth (maximum)101.60mmLength (maximum)147.00mm