How do I copy images from my phone onto my computer via usb if my phone screen is black?

[AC Question]

Someone broke my phone recently, but the only thing broken is the screen. It's a samsung galaxy s4 and everything seems to be working still, but the scren is black so I can't see anything I do on it. I can unlock it though. There was nothing on my SD card but I have it plugged into my laptop with a USB cord and I can see all of my pictures and music and the things i want to copy. I want to try to make a copy of the stuff but I don't know how. And, again, since the screen is black and I can't see I can't enable USB whatever it is or send the stuff over from my phone. I also never set up a cloud storage or anything like that so I don't have wireless access to my things. How can I copy the images onto folders on my laptop?