Store like a minimalist

Keep your memories digitally
For example, take pictures of your gifts, souvenirs, favorite notebook from childhood, a favorite sweater, etc. Use some app to scan all your papers, letters, and prints. Simply make everything digital - you can do everything with one phone.

Keep functional things
You will know you should discard something if you have it only because of its appearance and not functionality.

Keep things that spark joy
Just like Marie Kondo does - touch your things and keep only those that bring you joy.