A utilizing function apparatus include at least one processor, and a memory storing instructions that, when executed by the at least one processor, causes the at least one processor to, based on an operation, set one of at least one function temporarily unable to be executed, when it is detected that the utilizing function apparatus is connected to an external device after setting the one function temporarily unable to be executed, acquire information about an area of the memory of the utilizing function apparatus, as first information, when it is detected that the connection with the external device is released, acquire the information about the area of the memory, as second information, and when the acquired first information and second information are different, set the one function back able to be executed.