Samsung Galaxy S3 - Touch Screen Not Working

Hi
Yesterday, I broke my samsung galaxy s3 screen

Now all i get is a black screen. And with no way to access anything that is on the itnernal memory on my phone.

When I plug my phone, I usually have to bring down the menu bar, and click the mount option. However, as the phones touch screen doesnt work, and the screen is just black, I dont know how to back up my data.

Does anyone know if there is anyway of backing up my phone?

Thanks