Full Use Case:
Currently, we are storing the file in Google drive once its processed as standard app functionality. Is it possible to store the files in AWS S3 and save the file path in Salesforce for accessing it from Salesforce UI?
Nothing in RS Documents will do this automatically. But RS Documents can save a PDF in Attachments or Files as well as in Google Docs. Then you can build a script or maybe there is some app that can automatically move attachments to AWS for example. You can certainly build something to move Files and create a custom object to track for example using Apex code. If you need any help we can offer consulting services to help develop the solution, contact our consulting team for more information.