I ran into a problem with android with accessing it via USB. Didn’t understand why til I read this article. It used to look like a thumb drive, now its a MTP, or Media Transfer Protocol. Which makes sense so the connecting device doesn’t accidently overwrite your phone. I guess there is also PTP for photos too.
http://www.howtogeek.com/192732/android-usb-connections-explained-mtp-ptp-and-usb-mass-storage/