Dimensional Storage

Dimensional Storage (also called Hammerspace or Magic Satchel) is the ability to store as many items as one wishes in a sort of "storage area" without any regard for running out of room. Users are then able to summon the desired item(s) at their whim, making it seem as if they pulled each object out of thin air.

This ability is typically not used with any canonical explanations in fictional works. However, in some cases this is explicitly a power, often manifesting as magical bags with a capacity far greater than their physical size.