Write Output to Backup Path: Check this box to write the files changed during a replace operation to the directory specified in the Backup File Path field. This will leave the original file(s) in the search path unchanged. If Search Subdirectories was checked, the directory tree of the search path will be created as necessary under the path specified in Backup Directory. Note that if you check this, you need to remember that the newer, replaced versions of your file(s) will be in the Backup Directory. Search & Replace provides a reminder message when "Write Files to Backup Path" is checked.