This document discusses two methods for uploading multiple files from a local system to an AWS S3 bucket: 1) Using the multipart upload API, which allows files to be uploaded in parts for improved speed and recovery from network issues without restarting uploads. 2) Using the AWS CLI tool to recursively copy multiple files from a local directory to an S3 bucket, which ensures uploads continue even if the network connection drops temporarily. The AWS CLI method is demonstrated as an easy way to bulk upload files to S3 with resumable capabilities.