Index: plugins/files/config.php
--- plugins/files/config.php.orig
+++ plugins/files/config.php
@@ -28,7 +28,7 @@ define('PLUGIN_FILES_ASK_BEFORE_DELETE', true);
  * The directory where to save cache files for phpfastcache.
  * This is a fallback setting, redis should be always available.
  */
-define('PLUGIN_FILES_CACHE_DIR', "/var/lib/grommunio-web/plugin_files");
+define('PLUGIN_FILES_CACHE_DIR', "/cache/grommunio-web/plugin_files");
 
 /*
  * Set the verbosity of the plugin.