Of course the first thing recommended was using chkdsk. So I figured this might be software related.
The error that always popped: You need to format the disk before you can use it. I even removed the HD from its casing and used an external connector, but still no luck. When I got it back, I plugged it in my laptop and the laptop wouldn't read it.
I have a 1TB external hard disk (HD) that I lent to my friend to give me some folders.