diff -u b/src/Plugin/Action/VboExportBase.php b/src/Plugin/Action/VboExportBase.php
--- b/src/Plugin/Action/VboExportBase.php
+++ b/src/Plugin/Action/VboExportBase.php
@@ -7,6 +7,7 @@
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Drupal\Core\Render\RendererInterface;
 use Drupal\Core\StreamWrapper\StreamWrapperManagerInterface;
+use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Url;
 use Drupal\Core\Link;
@@ -21,26 +22,36 @@
 
   const EXTENSION = '';
 
-  const DEFAULT_SCHEME = 'private';
-
   /**
-   * @var RendererInterface
+   * The renderer service.
+   *
+   * @var \Drupal\Core\Render\RendererInterface
    */
   protected $renderer;
 
   /**
-   * @var StreamWrapperManagerInterface
+   * The stream wrapper manager service.
+   *
+   * @var \Drupal\Core\StreamWrapper\StreamWrapperManagerInterface
    */
   protected $streamWrapperManager;
 
   /**
+   * Default file scheme.
+   *
+   * @var string
+   */
+  protected $defaultScheme;
+
+  /**
    * {@inheritdoc}
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, RendererInterface $renderer, StreamWrapperManagerInterface $streamWrapperManager) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, RendererInterface $renderer, StreamWrapperManagerInterface $streamWrapperManager, ConfigFactoryInterface $configFactory) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
 
     $this->renderer = $renderer;
     $this->streamWrapperManager = $streamWrapperManager;
+    $this->defaultScheme = $configFactory->get('system.file')->get('default_scheme');
   }
 
   /**
@@ -52,7 +63,8 @@
       $plugin_id,
       $plugin_definition,
       $container->get('renderer'),
-      $container->get('stream_wrapper_manager')
+      $container->get('stream_wrapper_manager'),
+      $container->get('config.factory')
     );
   }
 
@@ -61,13 +73,14 @@
    */
   public function buildPreConfigurationForm(array $form, array $values, FormStateInterface $form_state) {
     $file_schemes = $this->streamWrapperManager->getNames();
-    $form['file_scheme'] = array(
+
+    $form['file_scheme'] = [
       '#type' => 'radios',
       '#title' => $this->t('File Scheme'),
       '#description' => $this->t('The file scheme which the generated export file will be saved to.'),
-      '#default_value' => isset($values['file_scheme']) ? $values['file_scheme'] : static::DEFAULT_SCHEME,
+      '#default_value' => isset($values['file_scheme']) ? $values['file_scheme'] : $this->defaultScheme,
       '#options' => $file_schemes,
-    );
+    ];
 
     $form['strip_tags'] = [
       '#title' => $this->t('Strip HTML tags'),
@@ -118,7 +131,7 @@
       $file->save();
       $file_url = Url::fromUri(file_create_url($file->getFileUri()));
       $link = Link::fromTextAndUrl($this->t('Click here'), $file_url);
-      drupal_set_message($this->t('Export file created, @link to download.', array('@link' => $link->toString())));
+      drupal_set_message($this->t('Export file created, @link to download.', ['@link' => $link->toString()]));
     }
 
   }