diff --git a/airtime_mvc/application/controllers/LibraryController.php b/airtime_mvc/application/controllers/LibraryController.php
index 2102a662e..c241599d7 100644
--- a/airtime_mvc/application/controllers/LibraryController.php
+++ b/airtime_mvc/application/controllers/LibraryController.php
@@ -356,6 +356,7 @@ class LibraryController extends Zend_Controller_Action
 
             if (isset($file)) {
                 try {
+                    Application_Model_Preference::updateDiskUsage(-1 * abs(filesize($file->getFilePath())));
                     $res = $file->delete();
                 } catch (FileNoPermissionException $e) {
                     $message = $noPermissionMsg;
diff --git a/airtime_mvc/application/models/Preference.php b/airtime_mvc/application/models/Preference.php
index 0bc4fc7ac..749aa8e06 100644
--- a/airtime_mvc/application/models/Preference.php
+++ b/airtime_mvc/application/models/Preference.php
@@ -1415,4 +1415,24 @@ class Application_Model_Preference
     public static function GetHistoryFileTemplate() {
     	return self::getValue("history_file_template");
     }
+
+    public static function getDiskUsage()
+    {
+        return self::getValue("disk_usage");
+    }
+
+    public static function setDiskUsage($value)
+    {
+        self::setValue("disk_usage", $value);
+    }
+
+    public static function updateDiskUsage($filesize)
+    {
+        $currentDiskUsage = self::getDiskUsage();
+        if (empty($currentDiskUsage)) {
+            $currentDiskUsage = 0;
+        }
+
+        self::setDiskUsage($currentDiskUsage + $filesize);
+    }
 }
diff --git a/airtime_mvc/application/modules/rest/controllers/MediaController.php b/airtime_mvc/application/modules/rest/controllers/MediaController.php
index 7cd269c28..041178736 100644
--- a/airtime_mvc/application/modules/rest/controllers/MediaController.php
+++ b/airtime_mvc/application/modules/rest/controllers/MediaController.php
@@ -156,7 +156,8 @@ class Rest_MediaController extends Zend_Rest_Controller
             //our internal schema. Internally, file path is stored relative to a directory, with the directory
             //as a foreign key to cc_music_dirs.
             if ($requestData["full_path"]) {
-                
+                Application_Model_Preference::updateDiskUsage(filesize($requestData["full_path"]));
+
                 $fullPath = $requestData["full_path"];
                 $storDir = Application_Model_MusicDir::getStorDir()->getDirectory();
                 $pos = strpos($fullPath, $storDir);
@@ -196,6 +197,7 @@ class Rest_MediaController extends Zend_Rest_Controller
         $file = CcFilesQuery::create()->findPk($id);
         if ($file) {
             $storedFile = Application_Model_StoredFile($file);
+            Application_Model_Preference::updateDiskUsage(-1 * abs(filesize($storedFile->getFilePath())));
             $storedFile->delete(); //TODO: This checks your session permissions... Make it work without a session?
             $file->delete();
             $this->getResponse()
@@ -373,5 +375,6 @@ class Rest_MediaController extends Zend_Rest_Controller
 
         return $response;
     }
+
 }