External Hard Drive Won't Show Up

Hello.
I have a Toshiba Canvio Connect HDTC605XK3A1, a little more than three years old. It's a 3.0 HDD and I've been using a 2.0 USB wire instead of the 3.0 wire, it works fine, but since it's not connected in that other connector, it can be loose and the HDD does turn off. So, I finally got a 3.0 wire for it so it doesn't turn on and off by a little movement but now I don't see the HDD in my finder? This is strange because it works with the 2.0 wire. The light on the HDD is a different color as well, it's blue instead of white. Nothing in the manual indicates what this means, I've also searched online to see what it means, can't find anything. Does anyone know why it won't show up in my finder? It won't show up in the disk utility as well and when I go to the terminal and type in "diskutil list," it doesn't come up.

I've used two different 3.0 USB wires, both with the same results.

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External Hard Drive Won't Show Up

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