diff --git a/h5p-default-storage.class.php b/h5p-default-storage.class.php
index 9055266..6e39670 100644
--- a/h5p-default-storage.class.php
+++ b/h5p-default-storage.class.php
@@ -143,11 +143,18 @@ class H5PDefaultStorage implements \H5PFileStorage {
    *  Path on file system to temporary export file.
    * @param string $filename
    *  Name of export file.
+   * @throws Exception Unable to save the file
    */
   public function saveExport($source, $filename) {
     $this->deleteExport($filename);
-    self::dirReady("{$this->path}/exports");
-    copy($source, "{$this->path}/exports/{$filename}");
+
+    if (!self::dirReady("{$this->path}/exports")) {
+      throw new Exception("Unable to create directory for H5P export file.");
+    }
+
+    if (!copy($source, "{$this->path}/exports/{$filename}")) {
+      throw new Exception("Unable to save H5P export file.");
+    }
   }
 
   /**
@@ -162,6 +169,17 @@ class H5PDefaultStorage implements \H5PFileStorage {
     }
   }
 
+  /**
+   * Check if the given export file exists
+   *
+   * @param string $filename
+   * @return boolean
+   */
+  public function hasExport($filename) {
+    $target = "{$this->path}/exports/{$filename}";
+    return file_exists($target);
+  }
+
   /**
    * Will concatenate all JavaScrips and Stylesheets into two files in order
    * to improve page performance.
diff --git a/h5p-file-storage.interface.php b/h5p-file-storage.interface.php
index abee27a..3c621f7 100644
--- a/h5p-file-storage.interface.php
+++ b/h5p-file-storage.interface.php
@@ -90,6 +90,14 @@ interface H5PFileStorage {
    */
   public function deleteExport($filename);
 
+  /**
+   * Check if the given export file exists
+   *
+   * @param string $filename
+   * @return boolean
+   */
+  public function hasExport($filename);
+
   /**
    * Will concatenate all JavaScrips and Stylesheets into two files in order
    * to improve page performance.
diff --git a/h5p.classes.php b/h5p.classes.php
index ffe6f09..e043966 100644
--- a/h5p.classes.php
+++ b/h5p.classes.php
@@ -553,6 +553,11 @@ interface H5PFrameworkInterface {
    * return int
    */
   public function getLibraryContentCount();
+
+  /**
+   * Will trigger after the export file is created.
+   */
+  public function afterExportCreated();
 }
 
 /**
@@ -1574,11 +1579,15 @@ Class H5PExport {
     $zip = new ZipArchive();
     $zip->open($tmpFile, ZipArchive::CREATE | ZipArchive::OVERWRITE);
 
+    // Some system needs the root prefix for ZipArchive's addFile()
+    $rootPrefix = (empty($_SERVER['DOCUMENT_ROOT']) ? '' : $_SERVER['DOCUMENT_ROOT'] . '/');
+
     // Add all the files from the tmp dir.
     foreach ($files as $file) {
       // Please note that the zip format has no concept of folders, we must
       // use forward slashes to separate our directories.
       $zip->addFile($file->absolutePath, $file->relativePath);
+      $zip->addFile($rootPrefix . $file->absolutePath, $file->relativePath);
     }
 
     // Close zip and remove tmp dir
@@ -1591,9 +1600,11 @@ Class H5PExport {
     }
     catch (Exception $e) {
       $this->h5pF->setErrorMessage($this->h5pF->t($e->getMessage()));
+      return false;
     }
 
     unlink($tmpFile);
+    $this->h5pF->afterExportCreated();
 
     return true;
   }
@@ -1808,7 +1819,10 @@ class H5PCore {
    * @return Object NULL on failure.
    */
   public function filterParameters(&$content) {
-    if (isset($content['filtered']) && $content['filtered'] !== '') {
+    if (!empty($content['filtered']) &&
+        (!$this->exportEnabled ||
+         ($content['slug'] &&
+          $this->fs->hasExport($content['slug'] . '-' . $content['id'] . '.h5p')))) {
       return $content['filtered'];
     }