My external hard drive USB 3.0 is plugged into my USB 3.0 port on a Lenovo T430 laptop which prevents my opsys from booting beyond the BIOS splash screen and, also, prevents the entering of Sleep Mode. Upon resume from Sleep Mode the device is shown as USB Device Not Recognized. And these events do not occur when plugged into a USB 2.0 port except for the USB Device Not Recognized error still happens. Hope this is understandable to everyone and I am looking for a resolution to these events. Thanks.