This article shows what data is needed to send or move your project data.
The CAD model geometry of each project is saved as a DGN file. However if sending/copying the entire project then the encompassing WorkSet folder is required, as this contains the data files associated with the project, such as Weather locations and Construction types.
For a single project, you can retrieve the WorkSet as follows:
Alternatively, for several projects, you can retrieve the associated Workspace as follows:
Following this, if you have received Workset files and wish to open them on your machine please find guidance here.
For more guidance on Workspace and Workset folder structure see this article.