The Western Digital WD7500AACS 750GB is a hard disk drive, which means it stores data using quickly rotating disks, or platters, that can be read and written on via the moving actuator arm. Hard disk drives generally have a large storage capacity, and so are perfect for large amounts of data. The potential performance is well below that of solid-state drives, but they can definitely still hold their own. The Western Digital WD7500AACS 750GB is a fairly poor primary hard disk drive choice, as its performance leaves a lot to be desired. It would be fine to use as basic data storage, though.

With a cache of 16MB, the Western Digital WD7500AACS 750GB can store a relatively small amount of data temporarily, which will result in fast loading times but only for a small amount of previously loaded data. At a speed of 0 RPM, the hard disk drive spins at a very slow speed. This speed should be avoided entirely unless used as a dedicated storage system, as the resulting performance would be infuriatingly slow.

With a capacity of 750GB, the Western Digital WD7500AACS 750GB has a fairly small amount of storage for an hard disk drive. Using the SATA 2.0 3Gb/s interface this hard disk drive will not be limited by its connection with the motherboard, and there is currently no real reason to choose SATA 3.0 over SATA 2.0 for a mechanical hard disk drive (SSDs are another matter).