This seems to be the expected behavior as of now. The problem has been discussed upstream [1] and possible fixes or workarounds do exist.
[1] https://bugzilla.xfce.org/show_bug.cgi?id=3490 ** Bug watch added: Xfce Bugzilla #3490 https://bugzilla.xfce.org/show_bug.cgi?id=3490 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1312641 Title: Removable drives and media do not automatically mounted at boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunar-volman/+bug/1312641/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
