In the Probe Utility for the controller that there are some callbacks that appear related to retrieving or storing files: file_get_start, file_get_next, file_get_end, file_put_start, file_put_next, file_put_end.
How are these used?
DX UIM robot - Any Version
These callbacks are intended for internal use only and intentionally undocumented.
They are leveraged by the distsrv or automated_deployment_engine probes to deploy probes and packages to robots.
Due to the nature of UIM architecture, we do not have the ability to "hide" any callbacks, so there are many callbacks which are visibly exposed via the probe utility which are not supported for customers as they are intended for internal development purposes and not intended to be accessed by end users.