How to backup Database with Ionic Framework

backup.js

/*
 * Implementation with Ionic Framework with $cordovaFile plugin
 * ngCordova.
 */

.controller('Ctrl', function($scope, $cordovaFile) {

  $scope.backupDatabase = function() {
    // Backup Database ;
    var URI_DB = cordova.file.applicationStorageDirectory+'databases/';
    var PARENT_DIR = "file://mnt/sdcard/"
    var NAME_DB ="project_database.db";
    var NEW_NAME_BACKUP = "backup.db";
    window.resolveLocalFileSystemURL(URI_DB+NAME_DB, function(fs) {
      window.resolveLocalFileSystemURL(PARENT_DIR, function(directoryEntry){
        fs.copyTo(directoryEntry, NEW_NAME_BACKUP, function() {
          console.log("The database backup was successful.");
        });
      });
    });
  };

});

/*
 * Example on Cordova 3.5 in PhoneGap
 * with org.cordova.file Plugin
 */
 
window.resolveLocalFileSystemURL("file:///data/data/my-app-name/databases/name-of.db", function(fs) {
  var parent = "file://mnt/external_sd/";
  var newName = "mybackup.db";
  window.resolveLocalFileSystemURL(parent, function(directoryEntry) {
    fs.copyTo(directoryEntry, newName, function() {
      alert("Backup ok");
    }, failFiles);
  });
}, failFiles);

function failFiles(error) {        
  if (error.code == FileError.NOT_FOUND_ERR) alert("Message : NOT_FOUND_ERR" )
  else if (error.code == FileError.SECURITY_ERR) alert("Message : SECURITY_ERR" )
  else if (error.code == FileError.ABORT_ERR) alert("Message : ABORT_ERR" )
  else if (error.code == FileError.NOT_READABLE_ERR) alert("Message : NOT_READABLE_ERR" )
  else if (error.code == FileError.ENCODING_ERR) alert("Message : ENCODING_ERR" )
  else if (error.code == FileError.NO_MODIFICATION_ALLOWED_ERR) alert("Message : NO_MODIFICATION_ALLOWED_ERR" )
  else if (error.code == FileError.INVALID_STATE_ERR) alert("Message : INVALID_STATE_ERR" )
  else if (error.code == FileError.SYNTAX_ERR) alert("Message : SYNTAX_ERR" )
  else if (error.code == FileError.INVALID_MODIFICATION_ERR) alert("Message :  INVALID_MODIFICATION_ERR" )
  else if (error.code == FileError.QUOTA_EXCEEDED_ERR) alert("Message : QUOTA_EXCEEDED_ERR" )
  else if (error.code == FileError.PATH_EXISTS_ERR) alert("Message : PATH_EXISTS_ERR" )  
}  

thanks for the code