diff --git a/src/calibre/devices/usbms/device.py b/src/calibre/devices/usbms/device.py
index c92c2258e9..0e83069eb4 100644
--- a/src/calibre/devices/usbms/device.py
+++ b/src/calibre/devices/usbms/device.py
@@ -262,7 +262,7 @@ class Device(DeviceConfig, DevicePlugin):
                     return True
             return False
 
-        time.sleep(6)
+        time.sleep(8)
         drives = {}
         wmi = __import__('wmi', globals(), locals(), [], -1)
         c = wmi.WMI(find_classes=False)