Thanks, atlantean!
A couple more questions:
1. If I can't get the budget approval to buy the software recommended (it's almost the end of the year and allocations are low), is there an open source alternative, or a trial software by another company that has no limitations?
2. You talked about copying to an external device. Would the (any) software be able to copy directly to the device? It would probably take hours, wouldn't it? If it takes hours, is the process usually hassle-free (i.e. I don't have to keep an eye on it), so I can actually leave it to run?
Many thanks again!