title: Azure File Copy Task in pipeline creating $tf directory
body: <p>I have a Azure File Copy Task as a part of my build. Some directory needs to be recursively copied to a blob container. Basically, the &quot;cdn&quot; directory from sources should be copied to the cdn blob container.</p>
  <p>So, as &quot;Source&quot; for the task, i specified &quot;$/Website/AzureWebsite/www.die.de/cdn-content/cdn/*&quot;
  As &quot;Container Name&quot; i specified &quot;cdn&quot;.</p>
  <p>The task works: My files do get copied. However, after the copying ends, i also see a directory named &quot;$tf&quot; which has various subdirectories with numbers as names. (0, 1, 2, etc.). All of those contain files named &quot;*.gz&quot; or &quot;.rw&quot;.</p>
  <p>Where is this coming from and how do i get rid of it?</p>