A trunk space storage system for motor vehicles comprising a movable wall. This movable wall is located on the floor of the trunk space and acts as a new back wall of the trunk space. This movable wall slides along tracks on the floor of the trunk space to a position the user desires. The movable wall further comprises a wall extension to increase the wall height. This invention allows users to utilize as much of the trunk space as necessary without having the problem of having objects roll into the deep trunk space which can be difficult for many people to access.