title: Adb backup does not work on my HarmonyOS 2.0 phone
body: <p>When I tried to back up my app data, it doesn't work. Specs are listed below:</p>
  <ul>
  <li>Huawei mate 10</li>
  <li>HarmonyOS 2.0.0</li>
  <li>version: 2.0.0.230</li>
  </ul>
  <p>I just run</p>
  <pre><code>adb backup -f phi.ab -noapk -noshared -nosystem com.PigeonGames.Phigros
  </code></pre>
  <p>when the app that I want to backup is open. But my phone doesn't even display the &quot;full backup&quot; interface.</p>
  <p>My computer shows:</p>
  <pre><code>C:\Users\BingHeng\Desktop&gt;adb backup -f phi.ab -noapk -noshared -nosystem com.PigeonGames.Phigros
  WARNING: adb backup is deprecated and may be removed in a future release
  Now unlock your device and confirm the backup operation...
  </code></pre>
  <p>Then nothing. It just creat a backup file with 0 byte.</p>
  <p>I am sure that my mobile phone has been connected to the computer, and all other ADB commands can be used normally. Like &quot;adb install&quot;, it can be used.</p>
  <p>I don't know what I should do now.</p>