I have a MSI 970 gaming mobo, Samsung SSD, and a WD Black 1TB HD. This all started with what I thought was just a faulty WD Black drive but recently I received a replacement warranty drive. The drive continued to disappear causing me to have to unplug and plug the drive back in. I have replaced the Sata cable, replaced the power cable, switched the Sata port on the motherboard, and updated my Mobo drivers. If I try to play Fallout 4 on my HD it freezes and eventually crashes, if I try to install another game on my drive it will tell me there is not enough disk space available even though there is 830 gigs of free space.