The ornamental design for pop-out side step storage for an electricvehicle, as shown and described.
FIG. 1 is a perspective view of pop-out side step storage for an electric vehicle, with the roll-top cover closed; and,
FIG. 2 is a perspective view of pop-out side step storage for an electric vehicle, with the roll-top cover and storage compartment covers open.
The broken lines present in the drawings are included for the purpose of illustrating portions of the article which form no part of the claimed design.