Proposed are a file storage apparatus and an access control method capable of facilitating the setting and change of an access right of a user for accessing a file. The feed tab and first shorting tab are parallel and close to each other and connected to the first part at a chosen place located at a chosen distance away from the slot opened end in order to define a chosen input impedance. The flywheel is rotatably secured to the machine frame about a flywheel base joint, and is eccentrically connected to the motion bar at a flywheel motion bar first joint.