Hi I have a Western Digital 1.5tb AV-GP hard drive as a backup drive. A quick format takes 1 hour wher as on the Samsung only seconds. Using USB 3.0 I transferred 600gb to the samsung in approx 3 hours at 51mb/s. Trying to do the same on the western digital says will take 27days and speed is 112kb/s. Tried copying hard rive to hard dive and the same result maximum transfer 117kb/s. Tried with standard windows file copy and teracopy.
Running Western Digital diagnostic didnt pick any problems.
Running Windows 7 Home Premium 32bit.
Tried on gigabyte motherboard with intel i3 processor and Asus board with Amd X4 640 processor. Tried with different cables to no effect.
Both drives are sata 2 and have tried on sata 2 ports and sata 3 ports with no difference.