Miniform - starting v 0.12 - now has the option to NOT store the received data in the server database.
The European privacy laws - becoming effective in may 2018 - has rules about storing personal data without explicit user consent.
For this reason an option was added that will tell the module the data should not be stored at all.
Note: This is not meant to be the complete solution to comply to all privacy rules. The received formdata will be stored and used localy by the receiver too and you will need to make clear what you will be doing with this personal (sensitive) data. It will help in minimizing the chance of forgetting data being stored on your webserver.