The IBM Hitachi HUS724020ALS641 2TB 7.2K SAS 3.5" 128MB Cache HDD 98Y3238 is a high-quality internal hard disk drive designed for reliable storage in computers and networking systems. With a capacity of 2TB and a cache size of 128MB, this SAS drive offers fast data transfer and retrieval. As a unit sold individually, this HDD from IBM is a dependable choice for expanding storage capabilities in various devices.