Thank you for the answer. I filled a bug here : https://bugzilla.gnome.org/show_bug.cgi?id=768031
** Bug watch added: GNOME Bug Tracker #768031 https://bugzilla.gnome.org/show_bug.cgi?id=768031 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1595927 Title: Impossible to format a USB who contains bootable ISO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-disk-utility/+bug/1595927/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
