I have a MSI GT80 Titan SLI and it randomly sees the 2.5" SSD that is Samsung 860 EVO 1TB.
I have to reboot a number of times until it finally sees it. It does not appear in the Disk Management.

I tried 2 different SSDs (Samsung 850 and 860) in two different GT80 that ran two different windows installs. And the problem was replicated consistently. So neither the machine nor the SSD is the common denominator.
So I can say the issue is not my drive, or the particular GT80 machine. Seems to be a bug in Windows?

would trying a bigger SSD revolve the problem? Say 2TB.
Or another brand?