I have a mapped drive letter to my NAS, So DVDFab is saving to Drive "X:\movies" for example. I use DVDFAB's Clone mode to make a 1:1 copy, Seems to take about 30 minutes start to finish. It ALWAYS starts out saying it's going to take longer, and the estimate lowers as it progresses. My NAS is a 4 drive unit that can read/write faster than my netowrk. Server and NAS are connected via Gigabit Ethernet.