This Seagate 3.5" Hard Drive Barracuda ES.2 is a top-of-the-line internal HDD that offers 500GB storage capacity and a 7200 RPM rotation speed. Its sleek silver color and form factor make it a perfect fit for any computer setup. The unit supports HDD drive types and has a SATA II interface for easy connectivity. With a cache size of 32 MB, this Seagate model is perfect for storing large files and running multiple applications simultaneously. Its Barracuda product line ensures reliability and durability for your data. This unit is a great choice for anyone in need of a high-performance internal HDD.ST3500320NS