Since 16.04 (I think), where Files changed its behavior to show mounted drives in another window (a bad choice in my opinion, but whatever) this problem is not reproducible anymore. I marked as fixed thus.
** Changed in: unity (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1374383 Title: Clicking on "Files" opens new window, rather than switch to already open one To manage notifications about this bug go to: https://bugs.launchpad.net/nautilus/+bug/1374383/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs