The OPC UA server on the controller provides a public information model for accessing the "file system". An external OPC UA client (e.g. UaExpert) can be used to transfer (read/write) files to the controller.
Further information can be found in the chapter "OPC UA -> Controller: OPC UA Server -> File Access " in the attached documentation.
Included in the following products:
Controller c4x0 and c5x0 from version 1.13
Application:
This function is required for various use cases such as downloading recipes or G-code for the applications, download the boot project, upload the logbook...