ANSWER:

You’re talking about moving a 55.6 GIGABYTE file. There’s no way that will be instantaneous, even on the fastest of SSD’s. The mechanical hard disk probably is the biggest bottleneck in this case, with either reads or writes at 33.2 MB/s (or a combination thereof). Do the math and that is indeed around 30+ minutes to transfer.

by Joshua from http://superuser.com/questions/422437