A device may include a network interface for communicating with another device over a network, a storage unit to store content, and a processor. The processor may be configured to receive a request from a user to change usable storage space on the storage unit, send a message that describes the request to a service provider, receive a reply allowing the user to change the usable storage space from the service provider, provide at least one option to the user in response to the reply, receive information from the user selecting a first one of the at least one option, and set a size of the usable storage space to a value corresponding to the first option.