I can not write to the sd card

I have the problem that the following code creates the folder and the file in the internal memory.

And as I read in the documentation the path that I invoke getStErnalStoragePublicDirectory should do it in the SD memory.

I requested the permissions WRITE_EXTERNAL_STORAGE at run time as well as in the Manifest.

public void writeFile(String text){

String state = Environment.getExternalStorageState();
        if(Environment.MEDIA_MOUNTED.equals(state))
        {
            Toast.makeText(this,"mounted",Toast.LENGTH_LONG).show();
            if(!Environment.MEDIA_MOUNTED_READ_ONLY.equals(state))
            {
                Toast.makeText(this,"tienes permiso de escritura",Toast.LENGTH_LONG).show();
            }
        }

        File miFile= Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
        Toast.makeText(this,miFile.getAbsolutePath(),Toast.LENGTH_LONG).show();
        File archivo=new File(miFile.getAbsolutePath()+"/micarpeta/");
        archivo.mkdirs();
        File file=new File(archivo,"Ejemplo.txt");
        Toast.makeText(this,file.getAbsolutePath(),Toast.LENGTH_LONG).show();
        try{
        OutputStreamWriter fos=new OutputStreamWriter(new FileOutputStream(file));
        fos.write(text);
        fos.close();
        }
        catch (FileNotFoundException e)
        {
            Log.e("writeFile",e.getMessage());
        } catch (IOException e) {
            e.printStackTrace();
        }