Hi Murilo, welcome to the forum.
Have you explored the sample data for SDR that comes with InVEST? Find it in the sample_data folder of your InVEST 3.8.0 installation. And have you looked at the User’s Guide? http://releases.naturalcapitalproject.org/invest-userguide/latest/
If you have specific issues with running the model, please start by reading Guidelines for posting software support questions
Cheers,