I run into many situations where I need to copy numerous files, particularly when trying to move a user profile from one computer to another. A mistake I see even experienced IT techs make is using the standard Windows "drag-and-drop" to do these copy tasks. Doing things this way can take hours. There are also tools like Transwiz that can handle this for you, but I've found them to be less reliable than I would like. There's a much more efficient tool for copying lots of files, and it's been built into Windows for over a decade. Allow me to introduce you to Robocopy.