How i will Read & Write Data in path Swift?

//directory
   let path = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0].appendingPathComponent(\"fileSave\")
   let data: Data!
   //for Read Data
   do{
       data = try Data(contentsOf: path)
   }catch{
       print(\"\(error)\")
   }
   //for Write Data
   do{
       try data.write(to: path)
   }catch{
       print(\"\(error)\")
   }