Check setup (F2 at powerup) to make sure the drive is showing up at the hardware level.  If it is, you then need to install the operating system onto it: [URL]
I have seen solution for this problem “update bios manually”. I was unable to see my desktop except the hard drive not installed message. Can anyone provide step by step procedure on how to update BIOS manually when I see hard drive not installed message on my screen. Thanks in advance.
Dell XPS 13 9360 hard drive not installed