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@GreenFlux I actually have need for this exact functionality in a build Iโm working on right now!
This is actually what I need, I found the following script online for PDFs:
Download Gmail Attachments to Google Drive with Apps Script
From: https://www.labnol.org/code/20617-download-gmail-attachments-to-google-drive
export const saveGmailtoGoogleDrive = () => {
const folderId = 'Google_Drive_Folder_Id';
const searchQuery = 'has:attachments';
const threads = GmailApp.search(searchQuery, 0, 10);
threads.forEach(thread => {
const messages = thread.getMessages();
messages.forEach(message => {
const attachments = message.getAttachments({
includeInlineImages: false,
includeAttachments: true
});
attachments.forEach(attachment => {
Drive.Files.insert(
{
title: attachment.getName(),
mimeType: attachment.getContentType(),
parents: [{ id: folderId }]
},
attachment.copyBlob()
);
});
});
});
};No idea how that works; literally a copy/paste. 
The semicolons at the end of the thing has got me mixed up; howโs that work! haha
@LeventK how would you include something to copy PDFs and files into a Gdrive folder then? Is there something inherently more difficult about using the Drive API?
The wizard is in!!! 
So the URLs variable is an array, right; when thatโs written to a column is that written like a list would be in appsheet?
Like:
entry 1 , entry 2 , entry 3
or more appropriately:
www.url1.com , www.url2.com , www.url3.com
???
Okay @LeventK, if I could impose upon you for some debuggingโฆ 
Iโve created a variation of what @GreenFlux originally posted, with the hopes of migrating all PDF attachments into a google drive folder, as well as adding a list of all the file names into the row created by the script.
function emailToSheetWithAttach() {
/////GMAIL SETUP
var label = GmailApp.getUserLabelByName('YOUR_CUSTOM_LABEL'); // <-- RENAME TO YOUR CUSTOM FILTER LABEL
//var moveToLabel = GmailApp.getUserLabelByName('MOVE_TO_LABEL'); // <-- Uncomment to move to new label after download
/////GSHEET SETUP
var ss = SpreadsheetApp.openById('GSHEET_ID'); // <-- INSERT GSHEET_ID
var sh = ss.getSheetByName("Email"); // <-- Enter Sheet-Name where records should be created
/////GDRIVE SETUP
var destinationFolderID = 'Google_Drive_Folder_Id'; // <-- Enter the ID of the folder to copy files to
var filepath = "ENTER_THE_FILEPATH_TO_APPEND"; // <-- Enter the relative filepath to use when adding the file into a File column
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
var destinationFolder = DriveApp.getFolderbyID(destinationFolderID);
var threads = label.getThreads();
threads.forEach(thread => {
var messages = thread.getMessages();
messages.forEach(message => {
var sent = message.getDate();
var sender = message.getFrom();
var subject = message.getSubject();
var body = message.getPlainBody();
var attachments = message.getAttachments({
includeInlineImages: false,
includeInlineAttachments: true
});
var attachmentNames = [];
attachments.forEach(attachment => {
var file = DriveApp.createFile(attachment.getName(), attachment.copyBlob(), attachment.getContentType());
file.moveTo(destinationFolder);
var newFilePath = filepath + '/' + attachment.getName();
attachmentNames.push([attachment.getName()]);
});
ss.appendRow([sent, sender, subject, body, attachmentNames.toString()])
});
thread.removeLabel(label);
thread.moveToArchive();
thread.markRead();
if (typeof moveToLabel !== 'undefined') {thread.addLabel(moveToLabel)}
});
}
.forEach() seems super clean, I hope Iโm using it right. I tried to find some documentation in the Apps Script documentation, but found very little actual documentation - only uses that I could infer from.
@LeventK and @MultiTech_Visions , you guys have been busy!
I posted this morning with the hopes of eventually figuring out the attachment thing, and I come back to find all the hard work done for me! 
This is seriously an awesome community. Thank you for your help, my friends! 
I was procrastinating because I knew there was a TON of stuff I needed to figure out - for extracting emails, getting them into the app, dealing with PDFs.
And here I drop into the community to see whatโs up, and @GreenFlux has solved half my problems already! Then @LeventK fills in the rest (and MORE)!
This community isโฆ da bomb!
The at part is telling you the line in your code in which the error sits. So if you go back to your apps script editor and fine line number 57, thereโs something starting from there that has a problem.
For further debugging and things, you should really make your own post about your issueโฆ and then reference to this one. (That way informative posts arenโt taken over with personal minutia.)
