Hey there, @Sgt_Smashed!
Can you please share more details about the troubleshooting you have done so far? I'd advise you to try swapping the USB cable and the USB port where you connect the external drive, if you haven't done this already. In case you have access to another system (PC or laptop), you should probably check how the HDD appears there as well. You mentioned that you hear the HDD spin up whenever you connect it to the computer, but I'd also advise you to go to Device Manager &
Disk Management in Windows and check if and how your external drive is recognized there. Posting some screenshots from there would help us a lot.
Keep us posted with the details!

SuperSoph_WD