Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
Well, if you're using the SATA power connector, and your motherboard supports "hot swap" features for SATA (I believe it does) it would certainly explain it
I believe this to be a bug with Nvidia drivers. Under certain circumstances, hot swapping a SATA drive wouldn't be that bad. However, you should NOT be able to "safely" remove a drive containing your active/boot partition. Nvidia has some work to do on their drivers I see (NCQ issues as well).