I use a cloning program called Macrium Reflect and it works great. Here's my concern. My 2 hard drives I'm using are Hitachi 1TB's I've purchased another hard drive identical but 500 Gb as I'm only using about 300 Gb on my main hard drives. I've had now two of the 500's and both do the same thing. When cloning they take 3 o4 times longer to finish compared to my 1TB hard drives. The best i can tell is both are identical in all ways except the data size. Anyone run into this and have any answers?