My Seagate USB hard drive shuts down every couple of minutes when plugged into the Surface Pro 3. This scenario... Surface Pro 3 (i7 256) plugged into external power. Seagate Backup Plus Portable Drive (2TB) plugged into USB 3 port. Working in PhotoShop 2014 the drive causes a audible alert (bing... bong) every two minutes (estimate) after which explorer pops open (my desired action on drive start) on the screen. I've gone into the obvious places to try to change this behavior but cannot find any solution. Any thoughts?