 <p>I found the answer and solution: </p> <ol> <li>As for access the <code>adb shell</code>, I need to enable "Root access" for ADB in "Developer options" (this apply for stock Android 4.0.4 by Cyanogenmod but the same option could be present somewhere else in your phone)</li> <li>As for File Expert, the "Root Explorer" functionality is only available in their paid version <ul> <li>I'm going to use ES File Explorer and the likes</li> </ul></li> <li>I haven't found a solution for access through ADT's Device Manager yet but I'm happy having 2 options above</li> </ol>