Hi there RJ_gamingBoss,
This 100% disk usage issue is more likely to be caused by OS services in Win 8/10 systems.
As yours is on Win 7, then my advice would be to back up the important data stored on the drive and test it afterwards:
http://www.tomshardware.co.uk/forum/282651-32-best-diagnostic-testing-utility
Look for pending/reallocated and uncorrectable sectors.
You can double check the connections. Attach the drive with different cables(especially power one) to another SATA port.
Let me know how this goes,
D_Know_WD