How to return export path without using copy to memory2 ?

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WebAPI

C#7.0

ASP.NET-Core

I working on web api asp.net core 3.1 I need to return export path direct without copying to memory so How to do that Please ?

How to return export path without copy to memory as below

return File(memory2, "text/plain", Path.GetFileName(exportPath));

meaning using exportPath instead of using memory2
exactly I need to return content file

What I have tried:

foreach (var m in mods)
                      {
                          List<InputExcel> inputmodulelist = new List<InputExcel>();
                          inputmodulelist = inputexcellist.Where(x => x.ModuleName == m).ToList();
                          var dtimport = DatatableConversion.ToDataTable(inputmodulelist);
                          DataTable dtexport = new DataTable();
                          dtexport = _deliveryService.LoadExcelToDataTable(_connectionString, dtimport);
                          ex.Export(dtexport, m, exportPath);
            
                      }
                  }
                  var memory2 = new MemoryStream();
                  using (var stream = new FileStream(exportPath, FileMode.Open))
                  {
                      stream.CopyTo(memory2);
                  }
                  memory2.Position = 0;
            
                  return File(memory2, "text/plain", Path.GetFileName(exportPath));