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Why second hard drive not showing up in Windows 11/10/8/7? So, in this article, we will share the causes and solutions to external hard drive not detected problem. However, some of them might meet the "second hard drive not detected in Windows 10" issue now and then, especially after a Windows 10 update. Most Windows 10 users probably tend to use two hard drives (internal main hard drive and another external hard drive) for data storage requirements. Why is my second hard drive not detected and showing up in Windows 10? What should I do to fix it?” With a simple restart, the drive cannot be detected and won’t show up, only after I shut down the machine completely, and push the power button back on, does this work. The drive stays until some random moment when Windows cannot detect it any more. “For some reason, my secondary hard drive keeps disappearing randomly while Windows 10 is running.
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