No, it cannot be stored. When the demand for wind energy tapers off, wind turbines are idled/turned off. The blades, like on a propeller driven aircraft, are turned sideways in the wind so that they cannot cause drag or be driven by the wind. I saw three of the very first wind turbines back in the 1980’s just outside Goldendale, Washington. One of the turbines had a tower that was 200’ tall with blades that were 150’ long. The turbine rotated at a maximum of 17½ RPM.