Despite infrequent appearances, Storage Devices (ストレージデバイス Sutorēji Debaisu) are actually much more commonly used among mages than Intelligent Devices - TSAB regular enforcement officers also use the general type. These lack the AI of intelligent devices, and have a single form, besides the non-battle shape taken in civilian form (e.g. S2U becomes a playing card). On the other hand, they supposedly process magic faster and the mage can't become overly dependent on the AI.