Alexa enquiries, Spotify listens, Netflix binges. Our everyday interactions with smart devices, digital services and the internet are generating huge amounts of data. How this data is created, processed and stored is increasingly affecting the planet’s natural environment as well as leading to cyber-security issues. Generating huge amounts of data generates huge amounts of carbon emissions (CO2). These emissions are harmful as they increase the Earth’s temperature and contribute to climate change. But we are not yet thinking about data impacts in this way. We must therefore design and adopt new, shared visions of more sustainable and secure data-driven practices and processes. Only then can we start to collectively work towards a sustainable and secure data-driven future. Through our research, we found that the sustainability and cyber-security of Edge-IoT data are issues which are deeply intertwined. Accordingly, we have generated the following series of 8 design guidelines for improving IoT data sustainability and cyber-security at the Edge. They were developed in collaboration with our project partners BBC R&D who are actively developing their own Edge-IoT technologies for public broadcasting.