title: How to say no to all "do you want to overwrite" prompts in a batch file copy?
body: <p>By default, copying from the command prompt will prompt you to overwrite files that already exist in the target location.</p>
  
  <p>You can add "/Y" to say "Yes to all" replacements.</p>
  
  <p>But how can you say "No to all" ?</p>
  
  <p>In other words, I want to copy everything from one directory that does <strong>not</strong> already exist in the target.</p>
  
  <p>The closest thing I see is the XCOPY argument to only copy things after a specific mod-datetime.</p>