I have an iPhone 5, it will be replaced in a week with a 6S. I use it to take pictures often. I also have an iPad and a MacBook Air in which I use the older iPhone program, but I am willing to switch to the newer Photos app if necessary. Currently I only upload pictures with the USB cable, but I would like to stop doing that and turn on whatever I need to in order to get all of my images to automatically show up on ALL of my devices. I've looked into the settings and noticed a few different options, such as iCloud Photo Library and My Photo Stream. I just want to make sure that I do it right so that I don't lose anything. Can someone please tell me which options I should set on each device? Thanks!