The disclosed embodiments provide a system that processes data from a user. During operation, the system obtains, at a cloud computing system, a set of data-sharing preferences for the user. Next, the system creates a set of virtual storage partitions for the user with the cloud computing system based on the data-sharing preferences. Upon receiving data from the user to the cloud computing system, the system associates the data with a virtual storage partition from the set of virtual storage partitions based on the data-sharing preferences and a set of data attributes for the data. Finally, the system manages access to the virtual storage partition by one or more other users based on the data-sharing preferences.