How to export more than one design model from DGN to DWG
DGN files allow to keep multiple design and sheets models in one file while DWG allow to have only one design model (model space) and multiple drawing layout (paper space), which are equivalent to sheets. Because of this discrepancy between software and in case of ultimately vision of saving the drawing to DWG, the best practice is to work only with one default design model inside DGN. However, if the DGN file contains more than one design model, in Save As DWF/DXF Options there are possibilities to determine the behaviour during export of Non-Default Models.
The below video is showing the example workflow.