I have the Seagate 1TB backup plus external hardisk. Recently when i plug it into my laptop(USB 3.0) the hard disk is not detected ,ie its not showinng up in my computer ,its not in disk management. In device manager ,under storage controllers ,"USB Attached SCSI (UAS) Mass Storage Device" comes up when i connect the hdd, other than that the hdd is not detected and also the led on hdd does not come on. It works fine on other laptops and pc. I have another one of the same hdd which works fine on my machine ...If anyone can tell me the problem here ty