A non-transitory computer-readable storage medium having stored therein a program, the program executing a process include storing an object that is a unit obtained by sectioning received data by a certain size, the object including a plurality of sessions; calculating a value related to an acquisition time for each of a plurality of data acquisition methods that include a first method that acquires the data in a unit of the session and a second method that acquires the data in a unit of the object; determining the data acquisition method based on the value related to the calculated acquisition time; performing the data acquisition with the determined data acquisition method; periodically acquiring the data with the data acquisition method other than the determined data acquisition method; updating the value related to the acquisition time; and determining the data acquisition method based on the value related to the acquisition time.