An online service provider (OSP) operates online data centers to store members' data objects relating to various online member services of the OSP. An aggregated catalog lists members' data objects residing in the online data centers and also those residing in member computers' local storage. An aggregator monitors contents of the online storage facilities to detect new storage of prescribed types of data objects owned by the members, and also communicates with member computers to identify prescribed types of data objects newly stored in the respective local storage. The aggregator updates the aggregated catalog to list the newly stored data objects. Responsive to a request by a member, a finder searches the aggregated catalog and utilizes results of the search to provide, for display at the requesting member's computer, a consolidated listing of online data objects and locally stored data objects owned by the requesting member.