diff --git a/src/calibre/devices/sne/driver.py b/src/calibre/devices/sne/driver.py
index bb8d34c59c..04e5cd0d76 100644
--- a/src/calibre/devices/sne/driver.py
+++ b/src/calibre/devices/sne/driver.py
@@ -33,6 +33,6 @@ class SNE(USBMS):
     STORAGE_CARD_VOLUME_LABEL = 'SNE Storage Card'
 
     EBOOK_DIR_MAIN = EBOOK_DIR_CARD_A = 'Books'
-    SUPPORTS_SUB_DIRS = True
+    SUPPORTS_SUB_DIRS = False