https://gdpr-info.eu/art-4-gdpr/ https://gdpr-info.eu/art-4-gdpr/ 7. ‘controller’ means the natural or legal person, public authority, agency or other body whi

https://gdpr-info.eu/art-4-gdpr/ https://gdpr-info.eu/art-4-gdpr/ 7. ‘controller’ means the natural or legal person, public authority, agency or other body which, alone or jointly with others, determines the purposes and means of the processing of personal data; where the purposes and means of such processing are determined by Union or Member State law, the controller or the specific criteria for its nomination may be provided for by Union or Member State law; 8. ‘processor’ means a natural or legal person, public authority, agency or other body which processes personal data on behalf of the controller; You are right though that GDPR doesn't apply to non-business individuals, but that doesn't make the image host the data controller. Maybe the user and the host are data controllers 'jointly'? Dropbox is quite clear that at least in their Business and Education accounts, the account owners are data controllers for all their data.