How should you store small items that are not used all year round but have commemorative significance?

Just buy a few small boxes from the Internet and put them in the storage room. I am a organizer and a collector. I like to collect souvenirs from various life stages. For example, greeting cards from elementary school classmates, diaries written in middle school, letters written by classmates in college, stones picked up at the beach for the first time, plane tickets from the first plane ride, reading notes, work Diaries, certificates, handprints and footprints of children when they were born, grandpa’s paper-cuts and Chinese knots, maps from traveling alone, the terracotta warriors and horses in Xi’an... all kinds of strange items are full of memories in life.