We recommend either simply uploading your files during the order approval process or submitting them to us at a later time. We generally can accept up to 150MB to be uploaded online per file. If you have trouble uploading your file, or it exceeds 150MB, then simply select to upload files at a later time. You can then continue to generate the order online. Once you receive an order number, please reach out to us with your files at Support@4over4.com (or file transfer link using WeTransfer or similar) along with the order number. FILE UPLOADING IS STRONGLY RECOMMENDED!