noun

a folder or box for holding loose papers together and in order for easy reference.

a file of correspondence

folder,portfolio,binder,box,document case,filing cabinet

verb

place (a document) in a cabinet, box, or folder in a particular order.

the contract, when signed, is filed

categorize,classify,organize,put in place,put in order,order,arrange,catalogue,tabulate,index,pigeonhole,put on record,record,enter,store,log,archive