How To Download File To Download's Directory With Ionic Framework?

I'm trying with ngCordova but the cordova.file.documentsDirectory property is null. I have also tried combining the use of ngCordova with requestFileSystem, but still, the file is

Solution 1:

cordova.file.externalRootDirectory + '/Download/' + 'sample.pdf' instead of directory.root.nativeURL + 'sample.pdf'

Solution 2:

I solved it via the following code:

constROOT_DIRECTORY = 'file:///sdcard//';
const downloadFolderName = 'Download';


this.file.createDir(ROOT_DIRECTORY, downloadFolderName, true)
  .then((entries) => {
 //then your code
 fileTransfer.download(fileLocation,this.ROOT_DIRECTORY+this.downloadFolderName+'/'+ 'sample.pdf').then((entry) => {
}
//ends of your code ^^
})
  .catch((error) => {
    alert('error' + JSON.stringify(error));
  });