title: creating sub pages does not work with this code in html can somebody help? once I click my wanted subpage it shows ERR_FILE_NOT_FOUND
body: <p>So I created my homepage, however, I am struggling to create my sub pages because I think I coded the navigation bar wrong. Could someone help and say why it so? Once I click the sub pages for example Samsung it says ERR_FILE_NOT_FOUND.
  for my samsunggalaxys9.html file, I copied the code below.</p>
  
  <pre><code>&lt;DOCTYPE HTML!&gt;
  &lt;html&gt;
  &lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;meta name="author" content="john khan"&gt;
  
  &lt;link rel="stylesheet" href="style.css" type="text/css"&gt;
  
  &lt;/head&gt;
  &lt;body&gt;
  
  &lt;header&gt;
  
    &lt;video autoplay loop class="video-background" muted plays-inline&gt;
  &lt;source src="video.mp4" type="video/mp4"&gt;
  &lt;/video&gt;
  ****&lt;nav&gt;
  &lt;div class="nav"&gt;
    &lt;img src="logo.png" class="logo"&gt;
  &lt;ul class="Menü"&gt;
    &lt;li&gt;&lt;a href="SamsungGalaxyS9.html"&gt;Samsung Galaxy S9&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href="iPhoneX.html"&gt;iPhone X&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href="GooglePixel2.html"&gt;Google Pixel 2&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href="HTCU11.html"&gt;HTC U11&lt;/a&gt;&lt;/li&gt;
    &lt;/ul&gt;**
  
  &lt;/div&gt;
  &lt;/nav&gt;** here is where I had my linking to my other HTML files, however, this doesn't work
  
  &lt;div class="msg"&gt;
    &lt;h1&gt;Die besten Handys aus dem Jahr 2018&lt;/h1&gt;
  &lt;/div&gt;
  &lt;/header&gt;
  
  &lt;/body&gt;
  &lt;/html&gt; 
  </code></pre>