Get All Files in Google Drive

gistfile1.txt

//Open GoogleSheet and Script

function list_all_files_inside_one_folder_without_subfolders(){
  var sh = SpreadsheetApp.getActiveSheet();
  var folder = DriveApp.getFolderById('1uF19N4LJzyt7sc_vz7h0Gs1B0k7VqdWP'); // I change the folder ID  here 
  var list = [];
  list.push(['Name','ID','Size']);
  var files = folder.getFiles();
  while (files.hasNext()){
    file = files.next();
    var row = []
    row.push(file.getName(),file.getId(),file.getSize())
    list.push(row);
  }
   sh.getRange(1,1,list.length,list[0].length).setValues(list);
}