If you want to insure that your family photos are passed down forever to your grand children, then consider DNA digital data storage. It's a special gift that will always be with them. Even in the event of a disaster where your family line is cut short, the data can be still be persisted indefinitely, so long as their remains are held in cold, dry and dark conditions.
.. On August 16, 2012, the journal Science published research by George Church and colleagues at Harvard University, in which DNA was encoded with digital information that included an HTML draft of a 53,400 word book written by the lead researcher, eleven JPG images and one JavaScript program. Multiple copies for redundancy were added and 5.5 petabits can be stored in each cubic millimeter of DNA.[4] The researchers used a simple code where bits were mapped one-to-one with bases, which had the shortcoming that it led to long runs of the same base, the sequencing of which is error-prone. This research result showed that besides its other functions, DNA can also be another type of storage medium such as hard drives and magnetic tapes...
https://en.wikipedia.org/wiki/DNA_digital_data_storage
"Do not seek to follow in the footsteps of the wise. Instead, seek what they sought." - Matsuo Basho