Glyph GPT50 USB 3.0 - 1TB "Choose from 500GB, 1TB, 2TB, 3TB, and 4TB capacities Rotational speed of 7200 RPM Optimized USB 3.0, FireWire, and eSATA connectivity Intelligent temperature-controlled quiet fan Industry-standard power cord and a pro-quality internal power supply Disk health monitoring, drive analysis that never sleeps" Rotational speed of 72 RPM "Optimized USB 3., FireWire, and eSATA connectivity" Intelligent temperature-controlled quiet fan Industry-standard power cord and a pro-quality internal power supply