Format the key with windows didn't help but format it with gparted seems to have solved it So, you can close this bug report Thanks for all
** Changed in: pcmanfm (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/710079 Title: Usb key hot plugged failed -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs