title: Android external storage permission
body: <p>Recently updated my honor 4c to the latest firware and link2sd stopped working. It gives every time Read only error. So I looked in some forums and found possible solution but can't use it. So the thing is to change android /etc/permissions/platfrom.xml file and change</p>
  
  <pre><code>&lt;permission name="android.permission.WRITE_EXTERNAL_STORAGE" &gt;
      &lt;group gid="sdcard_r" /&gt;
      &lt;group gid="sdcard_rw" /&gt;
  &lt;/permission&gt;
  </code></pre>
  
  <p>to</p>
  
  <pre><code>&lt;permission name="android.permission.WRITE_EXTERNAL_STORAGE" &gt;
      &lt;group gid="sdcard_r" /&gt;
      &lt;group gid="sdcard_rw" /&gt;
      &lt;group gid="media_rw" /&gt;
  &lt;/permission&gt;
  </code></pre>
  
  <p>But I tried that with <code>adb pull</code> and get error</p>
  
  <pre><code>failed to copy 'platform.xml' to '/etc/permissions/platform.xml': Read-only file system
  734 KB/s (7390 bytes in 0.009s)
  </code></pre>
  
  <p>Phone is rooted.</p>
  
  <p>How can I do that??
  Please help.</p>