Sadly I don't think it is possible in existing Tidal
I would think this would be an easy add for Tidal Developers and had commented on this as a feature request some time ago.
In the disposition section they could add an operation to save attachement (save as... and allow varaibles to be used...). I think you have to follow a procedure to request this feature.
This could be useful from both external data file providers and end users who want to trigger jobs (like reload this file) that are all currently manual.