To successfully upload your project later from the PLC, you must actively check the option to "include source files" before initiating a download. This packages the project as a .zip file on the controller.
If you are installing new systems or modernizing a line, it is worth noting that FST is considered legacy software. Festo now pushes the , which integrates configuration for drives, pneumatics, and electric cylinders into a modern, user-friendly interface. festo software tools fst 410 download 26 updated