Learn in the textbookThe Role and Basic Functions of an OS
DefinitionFile management (ファイル管理) is the OS function that handles data in named units called files (ファイル) and organizes them in a hierarchy of folders (フォルダ, also called directories).
ExplanationUsers can open or save a file just by giving its name, without knowing where on the storage device the data physically sits. Because folders can hold further folders, files can be sorted into a hierarchy that branches like a tree.
AnalogyIt resembles the classified shelves of a library. Narrow down from the subject shelf to a smaller section within it, and you reach the book you are after.
Memory hookIn a path, "/" or "\" (shown as "¥" on Japanese systems) is the separator for stepping down one folder level.