The file is a concept as old as computers themselves. Even before computers had disks for storing files in memory, their programs and data were filed away in physical paper copies. After the transfer from paper to disk, file management became a key part of computer usage, growing in importance as the users' needs to access, edit, copy, delete, or view information about those files also grew. In the modern world, most file managers are very similar, each having nearly the same advantages, disadvantages, and features as the rest.