diff --git a/src/calibre/devices/folder_device/driver.py b/src/calibre/devices/folder_device/driver.py
index 31da69d49a..2b4fc4dea9 100644
--- a/src/calibre/devices/folder_device/driver.py
+++ b/src/calibre/devices/folder_device/driver.py
@@ -28,6 +28,10 @@ class FOLDER_DEVICE(USBMS):
     supported_platforms = ['windows', 'osx', 'linux']
     FORMATS     = ['epub', 'fb2', 'mobi', 'lrf', 'tcr', 'pmlz', 'lit', 'rtf', 'rb', 'pdf', 'oeb', 'txt', 'pdb']
 
+    VENDOR_ID   = 0xffff
+    PRODUCT_ID  = 0xffff
+    BCD         = 0xffff
+
     THUMBNAIL_HEIGHT = 68 # Height for thumbnails on device
 
     CAN_SET_METADATA = True
diff --git a/src/calibre/gui2/device.py b/src/calibre/gui2/device.py
index fa77dc862f..31fe4bbbbd 100644
--- a/src/calibre/gui2/device.py
+++ b/src/calibre/gui2/device.py
@@ -225,10 +225,6 @@ class DeviceManager(Thread):
             if hasattr(self.connected_device, 'disconnect_from_folder'):
                 self.connected_device.disconnect_from_folder()
 
-#    def connect_to_folder(self, path):
-#        return self.create_job(self._connect_to_folder, None,
-#                    description=_('Connect to folder'))
-
     def _books(self):
         '''Get metadata from device'''
         mainlist = self.device.books(oncard=None, end_session=False)