Hard Drive not showing in Disk Management on Windows 10?

I'm currently running Windows 10, and I'm having a problem with one of my hard drives. I previously had only a single 120GB Samsung SSD and a 4TB WD HDD in my build, and both work fine. However, I recently added another 4TB WD HDD to my system, but I cannot see it in Disk Management. It shows in BIOS and in Devices & Printers, but not in Device Management (link to screenshots attached). Any ideas on what is causing this and how to fix it?
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  1. Best answer
    Hey there, jerredpope!

    Since your new 4 TB WD HDD is detected in Device Manager and BIOS, I'd recommend you to try the 'Rescan Disks' command in Disk Management and see if that will make the hard drive appear there, so you'd be able to initialize it and then partition & format it. If it still doesn't show up, I'd advise you to try using a different SATA cable and connect it to a different SATA port on the motherboard.

    If the problem persists, you might want to consider resetting BIOS. This would get your BIOS settings back to factory defaults, so you'd need to reconfigure them afterwards, though.

    Hope this helps. Keep me posted! :)
  2. I've had this problem on two different PCs now. I had Windows 10 installed on each hard drive & they worked separately, but when I plugged them both in I could only see one in Disk Management.
    Installing the SATA (RAID) driver from the motherboard manufacturer's website fixed it both times.
    Also bear in mind that there's an item 'Rescan Disks' within the Actions menu in Disk Management. That might help too, although it did nothing for me.
    Cheers, Nick
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