Hi there, I also keep all shots. I have a library of thousands of negatives and slides going back at least 25 years. They are in storage and are something for the kids to sort out when I'm gone
. Digitally I keep all shots on two x 1TB external hard drives. I grade each shot in Aperture when I download from the camera cards and anything I rate three stars and above stays in the Aperture Library in my computer drives for current use. The Aperture library is also backed up to a separate dedicated drive.