After you begin your genealogy project, you will quickly begin to accumulate many paper items which will need to be filed. You should safely preserve and be able to quickly locate original documents, photographs, research notes, photocopies, and correspondence.
You might devise an organizational system of your own or get ideas from other genealogists about how to tame your paper archives.
FamilySearch: Organizing Your Paper Files Using File Folders
Learn: Organizing Your Files