diff --git a/src/calibre/devices/mtp/defaults.py b/src/calibre/devices/mtp/defaults.py
index b8d091a347..3c4fd00369 100644
--- a/src/calibre/devices/mtp/defaults.py
+++ b/src/calibre/devices/mtp/defaults.py
@@ -68,4 +68,4 @@ class DeviceDefaults:
                     ans['calibre_file_paths'] = {'metadata':'NOOK/metadata.calibre', 'driveinfo':'NOOK/driveinfo.calibre'}
                 return ans
 
-        return {}
+        return {}, vid, pid
diff --git a/src/calibre/devices/mtp/driver.py b/src/calibre/devices/mtp/driver.py
index 266e1cf50c..a92b168b49 100644
--- a/src/calibre/devices/mtp/driver.py
+++ b/src/calibre/devices/mtp/driver.py
@@ -56,6 +56,7 @@ class MTP_DEVICE(BASE):
         self._prefs = None
         self.device_defaults = DeviceDefaults()
         self.current_device_defaults = {}
+        self.current_vid = self.current_pid = -1
         self.calibre_file_paths = {'metadata':self.METADATA_CACHE, 'driveinfo':self.DRIVEINFO}
         self.highlight_ignored_folders = False
 
@@ -88,6 +89,8 @@ class MTP_DEVICE(BASE):
         if storage_id in ignored_folders:
             # Use the users ignored folders settings
             return '/'.join(lpath) in {icu_lower(x) for x in ignored_folders[storage_id]}
+        if self.current_vid == 0x1949 and lpath and lpath[-1].endswith('.sdr'):
+            return True
 
         # Implement the default ignore policy
 
@@ -136,7 +139,7 @@ class MTP_DEVICE(BASE):
                     isoformat(utcnow()))
             self.prefs['history'] = h
 
-        self.current_device_defaults = self.device_defaults(device, self)
+        self.current_device_defaults, self.current_vid, self.current_pid = self.device_defaults(device, self)
         self.calibre_file_paths = self.current_device_defaults.get(
             'calibre_file_paths', {'metadata':self.METADATA_CACHE, 'driveinfo':self.DRIVEINFO})