Provided is an image forming apparatus, a control method, and a non-transitory computer-readable storage medium storing a control program. An image forming apparatus includes a flash memory, where a recording area of the flash memory can be regionally switched between a multilevel recording mode and a binary recording mode. The image forming apparatus further includes a history information creating section which creates use history information; a determining section which determines high frequently used data piece or pieces among data pieces stored in the flash memory, while referring to the use history information; and a recording area changing section which changes a size ratio of a region or regions operating in the binary recording mode and a region or regions operating in the multi-level recording mode in the recording area so that at least the determined data piece or pieces can be recorded in the binary recording mode.