MBP suddenly doesn't find my external hard drive when plugged into the USB port

Last night I worked on some wedding photo editing and let the laptop battery run all the way down forgetting to eject my Seagate external hard drive. I got the message when I booted it today that I didn't properly eject. Now it won't "see" the hard drive in any of the USB ports, but the hard drive is lit up so juice is going to it. Any ideas how to fix this one?

Open Disk Utility first.
Insert the drive.
If it appears in Disk Utility, use First Aid (Repair Disk)
This should be called (Repair Directory).
If it does not fix everything on the first try, run it again until it fixes everything or gets stuck.
Report any remaining error messages.
Consider getting an external Power supply for that drive.

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