Automatically Save Email Attachments to Google Drive Using Google Apps Script

saveNewAttachmentsToDrive.js

function saveNewAttachmentsToDrive() {
  var folderId = "PUT_YOUR_FOLDER_ID_HERE"; // Replace with the ID of the destination folder in Google Drive
  var searchQuery = "to:your-email@example.com has:attachment"; // Replace with the search query to find emails with attachments
  var lastExecutionTime = getLastExecutionDate();
  var threads = GmailApp.search(searchQuery + " after:" + lastExecutionTime);
  var driveFolder = DriveApp.getFolderById(folderId);
  for (var i = 0; i < threads.length; i++) {
    var messages = threads[i].getMessages();
    for (var j = 0; j < messages.length; j++) {
      var message = messages[j];
      var attachments = message.getAttachments();
      for (var k = 0; k < attachments.length; k++) {
        var attachment = attachments[k];
        var attachmentBlob = attachment.copyBlob();
        var fileName = attachment.getName();
        driveFolder.createFile(attachmentBlob).setName(fileName);
      }
    }
  }
  updateLastExecutionDate();
}

function getLastExecutionDate() {
  var properties = PropertiesService.getUserProperties();
  return properties.getProperty("lastExecutionDate") || "2023-09-01";
}

function resetLastExecutionDate() {
  PropertiesService.getUserProperties().deleteProperty("lastExecutionDate");
}

function updateLastExecutionDate() {
  var now = new Date();
  var dateString = now.toISOString().split("T")[0];
  var properties = PropertiesService.getUserProperties();
  properties.setProperty("lastExecutionDate", dateString);
}

You could try changing this:

var dateString = now.toISOString().split("T")[0];

to this:

var dateString = now.toISOString();

So it also considers time, but I'm not sure if GmailApp.search would work with the full ISO string.

Thank you for the reply, as you noted, yes it seem to not want to run once the full date and time are there. Perhaps it is a formatting issue. I found this here
https://stackoverflow.com/questions/12261785/searching-emails-in-gmail-based-on-time

var month = new Date().getMonth();
var date = new Date().getDate();
var year = new Date().getFullYear();
var time1 = new Date(year, month, date, 0, 0, 0).getTime();
var time2 = time1 - 86400000;
var query = "newer:" + time2/1000 + " older:" + time1/1000 + " in:inbox";
var conversations = GmailApp.search(query);

Can this be applied to fix the format?

I apologize in advanced as I'm not very skilled in programming.