Bulk rename file names in Drive Folder with Google Sheets

Issue:

If I understand this correctly, you want change names of the files in a Drive folder according to some sheet data (current name is in column A, and new name is in column B).

Solution:

If that's the case, I'd suggest the following:

• Get all sheet values with getRange().getValues().
• Iterate through all value rows.
• For each row, find the folder files whose name is the value from column A, using Folder.getFilesByName.
• Set the new file name with File.setName().

Code snippet:

const SPREADSHEET_ID = "SPREADSHEET_ID"; // Change according to your preferences
const SHEET_NAME = "Sheet1"; // Change according to your preferences
const FOLDER_ID = "DRIVE_FOLDER_ID"; // Change according to your preferences

function changeFolderNames() {
  const ss = SpreadsheetApp.openById(SPREADSHEET_ID);
  const sheet = ss.getSheetByName(SHEET_NAME);
  const folder = DriveApp.getFolderById(FOLDER_ID);
  const values = sheet.getRange("A2:B" + sheet.getLastRow()).getValues(); // If there's no header row, use "A:B" instead
  values.forEach(row => {
    const [oldName, newName] = row;
    const fileIter = folder.getFilesByName(oldName);
    while (fileIter.hasNext()) {
      const file = fileIter.next();
      file.setName(newName);
    }
  });
}