✔ Carpoid files are made of good material, non-toxic, tear-resistant, waterproof, durable ✔ Classification and storage of documents, memos, direct mail ✔ Organize bills and other bills ✔ Store instructions and receipts ✔ Organize childrens composites and free research ✔ Organize and store exam materials and conference documents ✔ Temporarily storage of years/postcards and so on.