Hi there MidnightDistort,
This sounds a lot like a loose connection/faulty cable issue.
This is why, you can start with something simple as just connecting the drive with a different USB cable.
As there may be something wrong with the USB port as well, it may be a good idea to connect the drive to another port as well. You can try the port on the back of the casing.
The best thing you can do is to just connect the drive to another system. This way, you will be sure whether the issue is system related or there's something wrong with the drive itself.
Let me know how this goes,
D_Know_WD