Western Digital WD Black 4TB WD4003FZEX SATA 6Gb/s 7200RPM 64MB Cache 3.5" HDD Western Digital WD Black 4TB Desktop Hard Drive, Model WD4003FZEX. The label confirms 4.0TB capacity, SATA interface, 64MB cache, and 7200 RPM.- No other accessories included We have 30 day returns money back guarantee . We do our best to describe everything accurately. This item is sold as shown are pulled from working environments and may include components that are untested, incomplete, or non-functional. While we do our best to describe each item accurately, we cannot guarantee the performance or compatibility of every part. See photos for more details. By purchasing, you acknowledge and accept this item is being sold as-is with no guarantees beyond what is stated.