Ticket #21179: 21179-1.diff

wp-admin/includes/media.php

@@ -1328 +1328 @@
 <?php
 // Check quota for this blog if multisite
 if ( is_multisite() && !is_upload_space_available() ) {
-        echo '<p>' . sprintf( __( 'Sorry, you have filled your storage quota (%s MB).' ), get_space_allowed() ) . '</p>';
+        echo apply_filters( 'upload_over_quota_error_message', '<p>' . sprintf( __( 'Sorry, you have filled your storage quota (%s MB).' ), get_space_allowed() ) . '</p>' );
         return;
 }