Sometimes You Just Need to Reboot Your System

If you ever have an issue with Arch Linux it could be due to a kernel issue. Due to Arch Linux’s rolling release nature, an update usually comes with a new kernel. Due to the mismatch between what you are running and what Arch Linux is now looking for, various things can stop working.

For me this specifically was the OS would not detect any new USB HDD I had just plugged into my computer.

After Identifying that it was a kernel issue, performing a simple reboot resolves the issue.