Présentation given by Stéphane Coutin during the PRACE 2017 Spring School joint training event with the EU H2020 VI-SEEM project (https://vi-seem.eu/) organised by CaSToRC at The Cyprus Institute. Science and more specifically projects using HPC is facing a digital data explosion. Instruments and simulations are producing more and more volume; data can be shared, mined, cited, preserved… They are a great asset, but they are facing risks: we can miss storage, we can lose them, they can be misused,… To start this session, we will review why it is important to manage research data and how to do this by maintaining a Data Management Plan. This will be based on the best practices from EUDAT H2020 project and European Commission recommendation. During the second part we will interactively draft a DMP for a given use case.