I should mention part of the problem is that the Lenovo does not have a built-in DVD drive, so it is connected through a USB port, which slows it down dramatically. Built-in DVD drives are what? PATA or SATA on newer laptops?
It did not occur to me when buying this what difference a USB DVD drive would make in performance. Minutes to copy instead of hours. The drive is USB 3.0. It is plugged into a Lenovo docking station which goes a 3.0 hub which then plugs into 3.0 port. All those extra hops may be the issue. I will try this with the drive directly into 3.0 port on the ThinkPad.
Pictures like this: