“文件夹”的英语？

他坐在一张放有6个文件夹的桌子后面。He sat behind a table on which were half a dozen files.她所有的信件都整齐地放在文件夹中。All her letters were carefully filed away in folders.职员们随意地将文件塞进文件夹里。Clerks bundled papers into files willy-nilly....