My 16 year old daughter has suddenly become a minimalist, help

She has sentimental boxes after sentimental boxes full of picture, ticket stubs, birthday cards, necklaces, random items, and the like. She places them in her closet and then forgets about them. I thought she started to throw them away, but she recently got into minimalism and is going through every single box and “purging” it. The sentimental value is subjective, and I don’t want her to regret throwing anything important away. <br><br>I am just worried that she is getting rid of the wrong items. She has expressed wanting to adopt a minimalist lifestyle, and I am happy to support her. I am just worried she is getting rid of things that mean a lot to her in the future. What should I do?