The Western Digital Blue 4TB WD40EZAZ is a 3.5-inch internal desktop drive designed for use with PCs. With a storage capacity of 4TB, this HDD is ideal for storing a large amount of data and files. The SATA III interface ensures fast data transfer speeds, while the 5400 RPM rotation speed provides reliable performance. The WD Blue product line from Western Digital ensures quality and durability, making it a dependable choice for your storage needs.