How can I copy my hard drive without duplicating files?

Episode 1121 (1:56:08)

Craig from Redondo Beach, CA
files copying

Craig did a backup using Windows Copy and it stopped half way through and crashed. Leo says that Windows Copy is a terrible utility, so terrible that Microsoft had a utility in the system called RoboCopy that would do it from the command line. So how does he get the rest without duplicating? For that, he would need a sync solution:

There's a lot of choices. Open a command line and type "XCopy". That should do it.