The Western Digital WD100EFAX 10TB hard drive is a reliable choice for those looking to expand their storage capacity. With a rotation speed of 5400 RPM and a cache size of 256 MB, it offers fast data access and transfer. This SATA III drive is designed for NAS servers, making it ideal for those needing a high-capacity storage solution for their network-attached storage system. Manufactured by Western Digital, a trusted brand in the industry, this HDD is a dependable option for those seeking a low-noise, high-performance storage solution. Used, working, removed from a NAS environment.