Seagate 320GB HDD SATA 6Gb/s 64MB Cache 3.5-Inch Internal Bare Drive (ST320DM000) Ideal for everyday desktop and computing storage Up to 6TB capacity, each TB (terabyte) capacity stores 120 HD video, or 200,000 photos, or 250,000 songs 7200 RPM on all capacities except for 4 TB Store data faster with SATA 6GB/s interface 2 year warranty. 64MB cache