Your first instinct might be to search for a free online converter. However, there are significant hurdles to this approach.
To help find the right approach for your specific file, could you share the of your RFA, whether it contains complex 3D geometry or simple 2D linework , and your preferred AutoCAD version ? Share public link
Verify the original RFA file size is under the online converter's limit (usually 50MB–100MB).
The standard AutoCAD file format, representing 2D drawings or 3D models. Why convert?
: Switch to the specific 3D, Plan, or Elevation view you want to convert. Export : Go to File > Export > CAD Formats > DWG .