I port is a clone of my old drive on this one usb (with ICY BOX AC603a-U3)
150GB transfer in 1h30 by usb 2.
Then I put the disc inside the mac and it is the revelation, why I have not done before?
the mac is much faster at startup much faster at the opening of application, I had ideas in my mac to replace soon, I feel that this one is going to serve me even 1 or 2 years.