Don't listen to these naysayers. Go right ahead and buy a "trash" HDD. The trashier the better.
The "really good harddrive" you have will cancel out the "trash harddrive". You can see that, can't you?
And then you'll be able to play your games to your heart's content.
Now we must confess that there is a possibility that the "trash hard drive" may AFFECT your
other hard drive, but it won't EFFECT it; of that you can be sure. As long as you pay attention to
the initial vowels of those two capitalized words you should be in the clear.
BTW, weren't you in my advanced physics class at Rutgers last semester? Weren't you the guy
who was building a drone from some empty Kentucky Fried Chicken boxes and an old Timex
watch? Just out of curiosity, did you achieve any success?