Western Digital 320GB 7200RPM 8MB SATA/300 3.5-Inch Hard Drive Western Digital Caviar SE WD3200JS SATA/300 Hard Drive General Features: 320 GB storage capacity 7200 RPM spindle speed 8MB buffer 8.9 ms average seek time 4.20 ms average latency SATA/300 interface (SATA II) Data Transfer Rate: up to 300 Mbps 3.5-inch form factor Regulatory Approvals: cUL CE C-Tick MIC