Downloading to internal memroy issue using IONIC 2 cordova file transfer plugin

Ionic Native
1

I tried to download .jpg file in internal memory storage using dataDirectory.
On downloading I see the image successfully message. But I don’t see the file in required directory
eg. internalstorage/android/data/myapp/files/ empty here

But same thing I tried with *externalDataDirectory * which is working fine.
eg. external storage/android/data/myapp/files/MyFile.jpg
Note: In this case I manually set the permission by going setting–> apps --> myapp–> permissions–> Storage enabled

here is the code snippet
’
downloadImage(image) {

this.platform.ready().then(() => {

  const fileTransfer: TransferObject = this.transfer.create();

  const url = `http://example.com/pug.jpg`;

  fileTransfer.download(url,this.file.dataDirectory+ 'MyFile.jpg').then((entry) => {

    const alertSuccess = this.alertCtrl.create({
      title: "Download Succeeded!",
      subTitle: "File was successfully downloaded to:"+this.file.dataDirectory',
      buttons: ['Ok']
    });

    alertSuccess.present();

  }, (error) => {

    const alertFailure = this.alertCtrl.create({
      title: `Download Failed!`,
      subTitle: `File was not successfully downloaded. Error code: ${error.code}`,
      buttons: ['Ok']
    });

    alertFailure.present();

  });

});

}
’

Please let me know If I am doing wrong any where or is there any file permission issue etc. Thanks