You don't have to export your file to get the models into Blender, you can just save the .blend file in the assets folder ...

posted to: Exporting to Unity
You don't have to export your file to get the models into Blender, you can just save the .blend file in the assets folder and Unity will import them: https://docs.unity3d.com/Manual/HOWTO-ImportObjectBlender.html
  • Kent Trammell replied
    True, Unity is able to read .blend files. We still prefer FBX generally..though maybe we should revisit using .blend files.