Western Digital 1TB WD Blue Mobile Hard Drive - 5400 RPM Class, SATA 6 Gb/s, 128 MB Cache, 2.5" - WD10SPZX - Walmart.com
Amazon.com: Western Digital 1TB WD Black Performance Mobile Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 32 MB Cache, 2.5" - WD10JPLX (Old Version) : Electronics