Hey Charles,
You can create a On change or After Commit event linked to the file entity (event handler). So everytime the source of the file is updated, the objects will be commited and will run automatically the microflow to update the data.
Check the event handlers documentation: Event Handlers | Mendix Documentation
On Change doc: On Click Event and Events Section | Mendix Documentation
If this answer helped, mark as accept :)
Best Regards,
Ricardo Pereira
Hee Charles,
If all your logic is in a microflow and working than you can create a scheduled event.
Hope this helps,
Good luck!