[Solved] [Win10] How do I prevent a USB docked HDD from spinning down constantly?

I have a full sized HDD in a USB 3 dock, and my power settings inactive timer is set to 300 minutes. This doesn't appear to be applying to the docked HDD, as it spins down in about 5 minutes or less. It takes forever to spin back up when I access it, so how can I change this?