A hard drive for a portable electronic device is provided that contains a multipurpose circuit board. The multipurpose circuit board may be mounted within a hard drive housing. System components and hard drive controller components may be mounted to the multipurpose circuit board. The multipurpose circuit board may be formed from a rigid flex structure or other structure that is able to accommodate translation of the multipurpose circuit board relative to the remainder of the portable electronic device in the event of an impact event. Components may be mounted to the multipurpose board in accordance with their heights. The portable electronic device may include components such as a battery, display, buttons, and other input-output devices that are connected to the multipurpose circuit board via flex circuit portions of a rigid flex or other electrical paths.