Robocopy can then back up. Robocopy versions on systems older than Windows Vista do not mirror properly. They ignore changed security attributes of previously mirrored files. When specifying the /MT[:n] option to enable multithreaded copying, the /NP option to disable reporting of the progress percentage for files is ignored. By default the MT switch provides 8 threads. The n is the number of threads you specify if you do not want to use the default. GUI Although Robocopy itself is a command-line tool, Microsoft TechNet provided a GUI front-end called Robocopy GUI. It was developed by Derk Benisch, a systems engineer with the MSN Search group at Microsoft, and required .NET Framework 2.0. It included a copy of Robocopy version XP026. It is no longer available from Microsoft, but may be downloaded from the Internet Archive's Wayback Machine. There are non-Microsoft GUIs for Robocopy: Cinchoo's ChoEazyCopy, Simple and powerful RoboCopy GUI v2.0.0.1 (March 11, 2022) "Easy RoboCopy", latest version 1.0.16 released on January 11, 2022. "WinRoboCopy" revision 1.3.5953.40896 released on April 19, 2016. RoboCop RoboCopy, Robocopy GUI Skin and script generator with Progress Monitoring, 10 September 2015. A program by SH-Soft, also called "Robocopy GUI" v1.0.0.24 (October 8, 2005). Ken Tamaru of Microsoft developed a copying program with functionality similar to Robocopy, called RichCopy, discontinued in 2010. It is not based on Robocopy, and does not require .NET Framework. Versions Several versions of Robocopy do not report the version number when executing robocopy /? on the command line. However, their version is stored inside the executable itself and can be queried with PowerShell for example (gcm robocopy | fl *) or inside Windows Explorer by right-clicking on Robocopy.exe, selecting Properties, then clicking on the Details tab. See also List of file copying software Command line List of DOS commands rsync GUI SyncToy Ultracopier References External links Official sources Microsoft Robocopy documentation Robocopy download (Version XP010) as part of Windows Server 2003 Resource Kit Tools. Includes 35-page documentation "robocopy.doc". Robocopy short documentation on Microsoft TechNet Library Robocopy GUI download (Version 3.1.2.0) on Microsoft TechNet Magazine Other ROBOCOPY.exe (XP Resource Kit/Standard Vista command) File copy utilities