Hello, OK, I just ran into something weird. I use a Logitech Anywhere MX wireless USB mouse most of the time so the USB dongle stays plugged in. No problem, it works fine. But today I also plugged in an external drive (2 TB Seagate USB 3.0). The moment I plug it in, I lose the mouse. Unplug the external drive, the mouse works. Hrmm... So I use the touchpad and then I get a "USB device not recognized" error. It blinked a couple times then the mouse started to work. then both the mouse and external drive stopped working. I did this a couple times. So has anyone been able to have a wireless mouse and external drive plugged in at the same time?