Answer:
Prior to smartphones, people used this to record their lives.
The most fabulous way to locate pots of gold
What is yours but only used by others?
What is often on the ground getting stepped on by others, but you donโt have to wash it because it never get dirty, in fact you couldnโt wash it even if you tried?
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?