WD Black Hard Drive

I have an HP Omen with SSD. I have two WD Green hard drives that have worked great for months and still do. If I remove one and insert my new WD Black hard drive, it is recognized in BIOS and is shown in Windows 10. The hard drive works fine. I have put gigabytes of files on it. However, if I leave the computer alone for several hours, the hard drive disappears. A simple reboot brings it back. I can repeat this day after day. Why does it keep disappearing? Again, the WD Green hard drive doesn’t have this problem in the exact same SATA slot.