"The Seagate 4TB GoFlex Desk is an impressive external storage drive that raises the bar for what can be stored on a single external storage drive. The key to this is the use of one of the very first 3.5" SATA hard drives that is 4TB in capacity. The performance of the Seagate 4TB GoFlex Desk drive was impressive with benchmarks like ATTO showing 192MB/s read speeds and 162MB/s write speeds! The Seagate 4TB SATA 6Gbps 7200 RPM 3.5" hard drive that Seagate uses inside the SuperSpeed USB 3.0 ready enclosure is no performance slouch! We didn't bother testing at USB 2.0 speeds as both the read and write speeds never dropped below the maximum speeds of USB 2.0..."