CreateDirectory.js

function CreateDirectory() {
    var parentDirectory     = cordova.file.externalRootDirectory;
    var directoryToCreate   = {{ FOLDER_NAME }}; // Make sure to change this to the directory name
    window.resolveLocalFileSystemURL( parentDirectory , function (dirEntry) {
    	function successHandler() {
    		console.log('Directory created');
    	}
    	function errorHandler(err) {
    		console.log('Error in creating directory.', err);
    	}
       	dirEntry.getDirectory(directoryToCreate, { create: true }, successHandler, errorHandler);
    });
}