HGST / Hitachi Ultrastar 7K3000 (Model: HUS723020ALS640) is a 3.5-inch enterprise-grade internal hard disk drive built for continuous 24/7 server and data center operations.Server hard drive only here please read carefully and make sure this is what you need. thanks for looking if you have any questions feel free to drop me a message.A server hard drive is a high-durability storage device built to run continuously in a server environment, storing and retrieving data for other computers across a network.Unlike a standard desktop hard drive, a server drive is engineered for heavy workloads, high reliability, and around-the-clock operation.