Use a Content from File Token
Content from file tokens are one of a range of tokens available within CSM
A Content from File token provides access to the content of a file in a One-Step™ Action. Once accessed, the content can be used in many different ways.
The Content from File token can only be used in a One-Step Action.
The Content from File token can be configured to use a Trusted Agent, but only for static files and not when users are prompted for a file. SaaS customers may be required to use this configuration. See Update a Business Object with Content from a File for an example of how to configure a One-Step Action using the Content from File token.