Weird IIS 404s

gistfile1.xml

<!--
  - Everything in "/Files/" was 404'ing. copied files to "/legacy/" and made this
  -->
            <rule name="files_folder" stopProcessing="true">
              <match url="^Files/(.*)$" />
              <conditions>
                <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
              </conditions>
              <action type="Rewrite" url="legacy/{R:1}" />
            </rule>