The Western Digital Purple Pro 18TB 7.2K SATA 6G 512MB 3.5" hard drive is a high-performance internal desktop drive designed for use with laptops and PCs. With a storage capacity of 18TB, this HDD offers fast read speeds of up to 272MB/s and a cache size of 512MB. Its purple color and Western Digital branding make it easily recognizable for those in need of reliable storage solutions. The drive is formatted for HDD storage only and utilizes SATA III interface for efficient data transfer. Perfect for professionals and enthusiasts looking for large storage capacity and high performance.