How to access to file in storage card `/sdcard/anyfolder/myfile` in Titanium SDK

example.js

// need storage permission to be added in manifest
function getFileFromExternalStorage(path) {
    if(Ti.Filesystem.isExternalStoragePresent()) {
    	var file = Ti.Filesystem.getFile(Ti.Filesystem.externalStorageDirectory, path);
        var newPath = file.nativePath.split(Ti.Filesystem.separator + Ti.App.id).join('');
        file = Ti.Filesystem.getFile(newPath);
        if(file.exists()) return file;
    }
	return null;
}