WD  4TB 7200 RPM SATA 6 Gb/s 64MB Cache, 3.5-Inch Desktop Hard Disk Drive (WD4003FZEX) Next-generation desktop performance hard drive designed to intensify your PC experience Improved Architectural Designs: Dual Core Processor, High Resolution Controller (HRC), StableTrac Technology Improved Data Protection: Vibration Control Technology (VCT), Corruption Protection Technology (CPT), NoTouch Ramp Load Technology Industry-leading 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.