Google released, Photos, an app to help you manage and store all of your photos for free. I've been using it and it's been pretty great thus far. It has automatically created stories of different trips and also combines relative photos to create gifs. I love me some gifs.
Google Photos will save a unlimited hi-res version of your photos. They can save original photos but that will cost you space and money. I take a lot of pictures and I've tons of services and this is by far the best solution.
Check out Google Photos.