|More in return is a master thesis exploring how we can use the upcoming GDPR law as a possible design opportunity. This diploma can be considered holistic and exploratory, where we dive into a number of topics such as the GDPR law, personal data, data trading, business, and ethics. Because we have worked in a broadly manner with a designerly approach, we believe this has contributed to valuable findings and analyzes in an otherwise unknown field.The focus of this diploma lies in using these findings and analyzes to design opportunities, rather than designing hi-fi, pixel perfect prototypes. Context In our process, we begin by looking at several opportunities the GDPR law can create across different topics. Eventually we scope the project to the context of personal data-trading. Personal data has a great value. In the data trading business enormous amounts of data is being traded every second between giant corporations. This is a trade idividuals are excluded from, even though the data is produced by- and about them. Aim The goal of this diploma is to shed a light on the possibility of enabling individuals to manage their personal data. By designing ManagingData, a proposal for how individuals can control the economical trading of their own data, we hope to create discussion around the ownership of personal data.