Even when a content is split due to a failure occurrence in the course of moving the content, the contents having been split are combined and reconstructed. A controller to move contents that moves the content stored in a first storage unit to a second storage unit, includes means for rendering the content to be playback impracticable, the content remaining in the first storage unit and corresponding to the content having been moved to the second storage unit, storing means for storing information regarding content movement, including information which specifies the content in the first storage unit and the second storage unit, selecting means for selecting one of continuously moving or reconstructing the content in the first storage unit when a failure occurs, means for verifying the second storage unit as a target and the content therein, by use of the information which specifies the second storage unit as a target and the content, and means for determining a range as to which the content movement is continued or the content is reconstructed, so as to continue one of the content movement and the content reconstruction.