file transfer - My Macbook doesn't import or copy photos from Galaxy S3

There are 663 photos in my camera. I want to share some of them them via computer with my mother who does not have a smartphone.

• My phone and computer are connected via USB cable.


• The Android File Transfer app is installed and working up to the point of showing me a window on my computer with choices of files to transfer.

However, when I click on DCIM or Pictures nothing comes up. Similarly, nothing happens when I click on Camera.

What am I doing wrong? How do I get those photos from my phone to show up in my computer? And will they be in both places? I'd like to keep them in my phone also.

Thank you.