Product Detail Western Digital WD Caviar RE 250 GB SATA Hard Drive General Features: 250 GB formatted capacity 7200 RPM spindle speed 16 MB buffer SATA/300 interface 3 Gb/s data transfer rate 3.5-inch form factor Regulatory Approvals: CE BSMI cULus C-Tick MIC . The "WD RE WD2500YS - Hard drive - 250 GB - internal - 3.5 - SATA-300 - 7200 rpm - buffer: 16 MB" is best product for you. We recommended WD RE WD2500YS - Hard drive - 250 GB - internal - 3.5 - SATA-300 - 7200 rpm - buffer: 16 MB