WD Red Pro 5TB NAS Hard Disk Drive - 7200 RPM SATA 6 Gb/s 128 MB Cache 3.5 Inch - WD5001FFWX Enhanced reliability with 3D Active Balance Plus and error recovery prevention with NASware 3.2 Extended drive testing to ensure each drive for extended reliable operation Most extensive NAS partner compatibility-testing list available 5-year manufacturer limited warranty Package includes a hard drive only - no screws, cables, manuals included. Please purchase mounting hardware and cables separately if necessary. 5-year manufacturer limited warranty