CAD data is stored in digital files that capture geometric and non-geometric design information. Geometric data includes 3D shapes, 2D drawings, and dimensions, while non-geometric data encompasses material properties, tolerances, and annotations. This data is stored in various file formats, either proprietary (e.g., .dwg, .prt, .sldprt) or neutral (e.g., STEP, IGES, STL), and can also be managed in databases within product data management (PDM) or product lifecycle management (PLM) systems. Increasingly, CAD data is stored in the cloud, facilitating easier access, collaboration, and backup. This comprehensive approach ensures more accurate and accessible design information for architecture and engineering.