Could you also tell me how to turn on the sync. Its really pain in ass to see how the things are complicated. I want my gallery pics to be uploaded with the same folder structure if possible. Only the newly clicked pics are uploaded.
I don't understand how are things 'complicated' for you. There is a proper setting in dropbox which you need to toggle to sync pics. Search for it.
Upload old pics which were not synced before you turned on the setting, manually.