Hi Haki Saki,

I am sorry for late reply for this. Kindly please find my response to your inquiries below:

1. What is stored here (For example: /public_html/media/com_easysocial/photos/396)?

Here I explain a little bit what is stored in each file that has been created.
For each of pictures that have uploaded, EasySocial will generate 5 more type of photos, which is: featured, large, square, stock and thumbnail. Each of them are used in a different location. These photos will be stored in the default directory /public_html/media /com_easysocial/photos/album id/img id/.

2. How do the naming conventions work?

EasySocial wil not renamed the photos, but it will append photo-size at back of the photo's name. As example: Test_original.jpg , Test_small.jpg

Hope this helps. Have a nice day