Exporting a Google Sheet into an Excel using Google script - excel

Question

I am trying to automate a backup of a google sheet into an excel.
After trying different scripts seen here and there on Stackoverflow, the one I have is now running but nothing is happening.
Any ideas?
Here is the code:
function exportAsxlsx() {
var spreadsheet = SpreadsheetApp.getActiveSpreadsheet();
var spreadsheetId = spreadsheet.getId()
var file = DriveApp.getFileById(spreadsheetId)
var url = 'https://docs.google.com/spreadsheets/d/'+spreadsheetId+'/export?format=xlsx';
var token = ScriptApp.getOAuthToken();
var response = UrlFetchApp.fetch(url, {
headers: {
'Authorization': 'Bearer ' + token
}
});
var blobs = response.getBlob();
var folder = DriveApp.getFoldersByName('Exports');
if(folder.hasNext()) {
var existingPlan1 = DriveApp.getFilesByName('newfile.xlsx');
if(existingPlan1.hasNext()){
var existingPlan2 = existingPlan1.next();
var existingPlanID = existingPlan2.getId();
Drive.Files.remove(existingPlanID);
}
} else {
folder = DriveApp.createFolder('BackUp');
}
folder = DriveApp.getFoldersByName('BackUp').next();
var formattedDate = Utilities.formatDate(new Date(), "GMT", "yyyy-MM-dd' 'HH:mm:ss");
var name = SpreadsheetApp.getActiveSpreadsheet().getName() + " Copy " + formattedDate;
folder.createFile(blobs).setName(name + '.xlsx')
}

Answer 1

So, here is a script that works:
function exportAsxlsx() {
var spreadsheet = SpreadsheetApp.getActiveSpreadsheet();
var spreadsheetId = spreadsheet.getId()
var file = DriveApp.getFileById(spreadsheetId)
var url = 'https://docs.google.com/spreadsheets/d/'+spreadsheetId+'/export?format=xlsx';
var token = ScriptApp.getOAuthToken();
var response = UrlFetchApp.fetch(url, {
headers: {
'Authorization': 'Bearer ' + token
}
});
var blobs = response.getBlob();
var formattedDate = Utilities.formatDate(new Date(), "GMT", "yyyy-MM-dd' 'HH:mm:ss");
var name = SpreadsheetApp.getActiveSpreadsheet().getName() + " Copy " + formattedDate;
var folder = DriveApp.getFolderById("your folder ID");
folder.createFile(blobs).setName(name + '.xlsx');
}