What advantages or disadvantages would best replicate a video game style inventory in an otherwise Modern setting?

What advantages or disadvantages would best replicate a video game style inventory in an otherwise Modern setting? I’m looking for guidance, as it seems to veer into the really expensive with cosmic advantages. Am I missing some lower key lower power possibilities?

The background is a modern setting with minor super powers which have a power level that do not exceed the level of influence on the world based on commonly available tech to a middle class family’s income base. Thus, things like guns & rifles (ranged attack powers), fireworks (explosive powers), hydraulic jacks (strength powers), man-portable tank of liquid nitrogen (freezing powers), and so forth are some examples of the limits on powers.

One of the proposed powers is an Inventory ability. Just that, nothing else. Store it, leave it, remove it. Thus, the analog tech would be a backpack or similar. Except that it is not visible or touchable by others.