The paper presents the legal regulations on switching between data processing services and porting data in the Data Act against the background of the right to data portability regulated by the General Data Protection Regulation. In the initial part of the paper, the basic issues concerning the construction of the right to data portability will be discussed with reference to the literature. Then, the essence of the Internet of Things, the Data Act and the relationship between the Data Act and the General Data Protection Regulation will be presented. The analyses included in the further part of the paper will deal with switching between services and data porting regulated by the Data Act. The final section will present the general conclusions of the analyses.