I unchecked and re-checked whatever is in the Devices multiple times, but nothing changes. Tested it with the ones in Favourites; they get updated fine real-time. But not whatever is in Devices. I used Terminal to repair permissions. Deleted finder plist and the sidebarlists plist and relaunched Finder again but nothing changes. One day it suddenly disappears and I can't add it back. Any idea on how to fix this?