I have built my PC and I have had it for a couple of months now, probably 4-5. Just recently, about 2 weeks ago, my HDD has been disappearing, and the only drive that shows up is my SSD with Windows installed. I sign in to my PC, and it tells me D:/Desktop is unavailable. It says this because I have transferred my desktop folder onto my HDD. It normally gets fixed by turning off my PC, unplugging both drives, turning on my PC, turning it off again, plugging in the drives and turning it back on. Over the weekend, I left and I got back today, and I discovered that the PC was just in sleep mode the entire time, because Windows was asking me if I wanted to save a notepad document. 🙁 I restarted my PC and it said that the D drive was unavailable. I did the steps I mentioned above but it is still not working. I left it for a bit, tried again a couple times, and now when I login to Windows 10, it shows me a black screen forever. I really have imaportant files on my HDD and SSD, and I really need access to my PC tomorrow, so if anybody has any suggestions they would be great! Thanks