I normally connect my phone by Cable to computer. The GT-I9100 will appear in my driver list. Then double click it, and explore the phone. All photos are kept in DCIM/Camera folder. You can create your own folders within Camera, name them as you like and organize the photos by cut and paste. Sometimes when I'm lazy I use ASTRO to move files from default Camera folder or folders made by other apps like Whatsapp. It's a manual job but personally I don't mind doing it.