title: Granting permissions to read external storage on Pydroid
body: <p>I would like to run a Python script on an external storage device on my Android.
  I plug into my device a card reader with SD card inserted, to my type-c input.</p>
  <p>I have downloaded Pydroid 3 to my device and tried to read and move files under its directory, but got a Permission Denied error.</p>
  <p>How can I grant permissions to Pydroid to edit the external storage?</p>