write files in Node.js
var fs = require('fs');
var txt = '\n' + tkn_psid_id + ':' + assetUrl;
var folderName = '/duplicates/bugging/videobug/' + tkn_psid_id + '.txt';
fs.appendFile(folderName, txt, function (err) {
if (err) {
console.log('Append Error');
} else {
console.log('DuplicateFolder' + folder);
}
});