Storage device for a cargo space for a motor vehicle

A storage device for a cargo space of a motor vehicle, comprising at least one partially flexible storage bag configured to be firmly secured in the cargo space, the storage bag comprising two opposing sides featuring a dimensionally stable supporting section extending along at least a length of the corresponding side, wherein opposing front areas of the supporting sections can be selectively attached to a mounting device in the cargo space, and the dimensionally stable supporting sections are connected to one another by a flexible folding structure extending into at least one floor area of the storage bag, wherein opposing front areas of the supporting sections are configured as holding pins protruding laterally outward and can be selectively attached to a mounting device in the cargo space, the mounting device further comprising two mounting areas which flank the storage bag on opposing sides, wherein each mounting area is provided with a longitudinal guide in the cargo space which is at least partly arranged in parallel to a cargo space floor for allowing the holding pins to be shifted, wherein the supporting sections and the folding structure are arranged in operating positions in such a way that the storage bag can be folded open or shut symmetrically to its central longitudinal axis, and further comprising means for automatically folding the storage bag.