My Book 3.0 Troubles

I recently bought a My Book 3.0 External Hard Drive with 1TB. I got it so I could transfer pictures from my 3 computers onto it. I have 2 laptops and a desktop. I’m trying to figure out how to get it set up to my laptops. The directions are not great and they show a desktop.  I bought this cause I was told it was easy to set up and use since it had a USB cord to just hook up to my computer and transfer photos onto the drive. But it seems very difficult to me.

Can I even use this thing with laptops? And how do I go about? Where do I find the PCIe slot on a laptop motherboard?

I figured it out. I only had to put the device in my PCIe slot if I wanted the 3.0 speed. Something the directions neglected to mention.