The Western Digital WD40PURX 4TB 5.4K RPM 3.5'' SATA Internal HDD in Purple is a reliable and high-performance internal desktop drive that is compatible with PCs. With a storage capacity of 4TB and a rotation speed of 5400 RPM, this HDD offers fast data transfer rates and ample storage space for your files and applications. The drive features a 64MB cache and is part of the WD Purple product line, known for its hybrid HDD/SSD features and ROHS compliance. Built by Western Digital, a trusted brand in the industry, this drive is a solid choice for expanding your storage capacity in a desktop setup.