This document provides instructions for using the Large File Transfer System (LFTS) including how to log in, reset passwords, navigate the system, manage contacts and address books, create and manage folders, upload and download files, and troubleshoot issues. The LFTS allows sharing of large files over 20GB in size with coworkers and clients through a web interface without relying on email attachments. Both Publicis Groupe employees and external clients and customers can access the system with proper accounts.