This last answer shows exactly what i meant:
No simple way to keep our data save. We can TRY and it will COST us our live to do it. Huge work - to select to save to duplicate to check - and We must be computer genies in order to do it.
Before the digital revolution live was simpler. We had few photos albums and it lasted many many years. Today we have thousands of digital photos and we are not sure they will last.