M Maghman Reputable May 1, 2017 11 0 4,510 Jun 26, 2020 #1 Hi, My HDD (4TB) just went missing. It was working fine up until a few hours ago. With no warning... gone. I opened and checked disk management, doesn't show up. I restarted the PC, and I don't think it showed up on the boot list (SATA port #3, I suspect). Has it failed? Overheated? Failed Cable?