Android/iOS: copy folder with contents

app.js

var win = Ti.UI.createWindow({
	backgroundColor : '#fff',
	layout : 'vertical'
});

var testButton = Ti.UI.createButton({
	title : "Copy Folder",
	top : 20,
	height : 50,
	width : 250,
});
testButton.addEventListener('click', function(e) {
	var folderName = "data";
	var srcDataDir = Ti.Filesystem.getFile(Ti.Filesystem.resourcesDirectory, folderName);
	var destDataDir = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, folderName);
	
	destDataDir.createDirectory();
	var files = srcDataDir.getDirectoryListing();
	Ti.API.info('ALL FILES ' + files);

	var qty = files.length;
	for(var i = 0; i < qty; i++) {
		Ti.API.info('ROW [' + files[i]+']');
		var srcFile = Ti.Filesystem.getFile(srcDataDir.nativePath, files[i]);
		var destFile = Ti.Filesystem.getFile(destDataDir.nativePath, files[i]);
		destFile.write(srcFile.read());
		Ti.API.info( "destFile: "+destFile.read() );
	}
	Ti.API.debug("srcDataDir: " + srcDataDir.getDirectoryListing() );
	Ti.API.debug("destDataDir: " + destDataDir.getDirectoryListing() );
});

win.add(testButton);
win.open();