title: batch robocopy is deleting all of my files
body: <p>I have the following directory structure:</p>
  
  <pre><code>\Users\DorrisPringle\Desktop\test
  \Users\DorrisPringle\Desktop\test\mycopy.bat
  \Users\DorrisPringle\Desktop\test\backup
  \Users\DorrisPringle\Desktop\test\backup\asdf.txt
  \Users\DorrisPringle\Desktop\test\backup\a_directory
  \Users\DorrisPringle\Desktop\test\backup\a_directory\qwer.txt
  </code></pre>
  
  <p>In the event that a key file doesn't exist, I want to copy backup/* into the directory "test." This gets executed from mycopy.bat:</p>
  
  <pre><code>if exist "\Users\DorrisPringle\Desktop\test\myservice.exe" (
      echo "all is good."
  ) else (
      robocopy "\Users\DorrisPringle\Desktop\test\backup" "\Users\DorrisPringle\Desktop\test" /MIR /R:1 /W:2
  )
  </code></pre>
  
  <p>This gives me the following error and ends up just deleting everything in the "test" directory. I was able to copy everything from my test directory into the backup directory using <code>robocopy</code> but I can't seem to get the opposite working.</p>
  
  <pre><code>  Started : Sunday, July 15, 2018 3:59:19 AM
     Source : C:\Users\DorrisPringle\Desktop\test\backup\
       Dest : C:\Users\DorrisPringle\Desktop\test\
  
      Files : *.*
  
    Options : *.* /S /E /DCOPY:DA /COPY:DAT /PURGE /MIR /R:1 /W:2
  
  ------------------------------------------------------------------------------
  
                             1    C:\Users\DorrisPringle\Desktop\test\backup\
          *EXTRA Dir        -1    C:\Users\DorrisPringle\Desktop\test\backup\
            *EXTRA File                  0        asdf.txt
          *EXTRA Dir        -1    C:\Users\DorrisPringle\Desktop\test\backup\a_directory\
            *EXTRA File                  0        qwer.txt
            *EXTRA File                177        s.bat
              New File                   0        asdf.txt
  2018/07/15 03:59:19 ERROR 3 (0x00000003) Copying File C:\Users\DorrisPringle\Desktop\test\backup\asdf.txt
  The system cannot find the path specified.
  </code></pre>