WD Red Pro 3TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch - WD3001FFSX Available in large capacities with support for 1-16 bays 5 year limited warranty Enhanced reliability with 3D Active Balance Plus and error recovery controls with NASware 3.0 Extended drive testing to ensure each drive is tested for extended reliable operation Vibration & Shock protection Package includes a hard drive only - no screws, cables, manuals included. Please purchase mounting hardware and cables separately if necessary. Ships in WD-certified box for safe transit during shipping