Did you know that ROBOCOPY is part of windows?
Robocopy, or “Robust File Copy”, is a command-line directory and/or file replication command. Robocopy functionally replacesXcopy, with more options. It has been available as part of the Windows Resource Kit starting with Windows NT 4.0, and was first introduced as a standard feature in Windows Vista and Windows Server 2008. The command is robocopy.
Its a way to backup your important files on your computer to always mirror the important files folder automatically. So when computer crashes you dont lose any important information.