Dell W8FW5 is a 3.5-inch hard disk drive for adding storage to compatible computer systems. The exact drive model is Seagate Enterprise Capacity ST2000NM0018, with 2TB capacity for files, applications and other data.
It connects through a SATA 6Gb/s interface and spins at 7200 RPM. A 128MB cache buffer and 512-byte native sectors are also specified for this model. Its 3.5-inch format suits systems designed for that drive size and SATA connection.
The listing describes it for systems that support 3.5-inch SATA hard disks. This identifies the interface and form factor needed for use; the product is the drive itself.