If your hard drive should crash, you can restore your system easily enough by running Seagate's restore utility and connecting the Replica to your system. (Seagate's software boots directly off the CD drive, so it should work even if your PC's hard drive is scrambled.) It took just over an hour to restore the system we tested. Again, we had a limited number of files on that system beyond the core components, so restoration will probably take longer in most cases.