To export a 3D model with bed adhesion features (e.g., brims, rafts), enable adhesion settings in your slicer software (like Cura or PrusaSlicer) first, then export the sliced G-code (for printing) or modified mesh file (if supported).
Bed adhesion elements are added in slicers—not the original CAD model—so you must configure these settings in your slicing tool before exporting.
For reuse, use your slicer’s "Export as STL" option after adding the brim/raft—this saves the adhesion features as part of the mesh for future prints.