I have two external hard drives that I use to back up to fairly often. I keep one on the desk and one in the safe, but not plugged in when not in use. Every so often, I'll burn two DVDs of the photos. I keep one set at home and another at the bank. When I'm dead, my kids can go through them if they wish. I rarely go through them.
As someone mentioned, photos used to be rare, and special. Now, they are prolific, and even considered clutter after a while.
When out first kid was in 4H photo projects, we allowed her to take 10 rolls of film. That was $3-4 dollars per roll. Plus $5-6 for developing and it was soon a $100 project. Then reprints, enlargements, mounting, etc, and then triple it because she was in 3 different categories, and we were looking at $300+ in costs!
Along comes 2nd kid and digital photography. She could take 500 pictures for the cost of a few batteries. Proof them all on screen. Print out the best ones for $.25 each. Mounting, etc... and they were only $20 projects.