The WD Green 4TB HDD WD40EZRX is a reliable internal desktop drive from Western Digital, designed for use with PCs. With a rotation speed of 5400 RPM and a storage capacity of 4TB, this SATA III drive offers fast data transfer rates and ample storage space for your files and applications. It also features a temperature sensor for monitoring and a cache size of 64 MB for improved performance. Compatible with HDD drive types and suitable for desktop use, this Western Digital hard drive provides a dependable storage solution for your computing needs.