This document discusses how to process multiple files sequentially through a file endpoint in Mule. It explains that by default, all files will be processed together in parallel using multiple threads. However, by setting the processingStrategy of the flow to "synchronous", files can be picked up and processed one by one from the inbound folder and dispatched sequentially to the outbound folder. The document provides an example Mule configuration and demonstrates that when multiple files exist in the inbound folder, they will be deposited one by one into the outbound folder over time rather than all at once.