A networked computer system, for sharing content based on an account group, comprising an electronic device (101; 310) and a cloud server, the cloud server comprising a shared server and a group server, the shared server comprising a storage space and the group server comprising account groups (326, 311, 332), the electronic device (101; 310) comprising: a communication circuit; a processor; and a memory configured to store contents and a content application related to a content and electrically connected to the processor, wherein the memory is configured to store instructions that, when executed by the processor, control the electronic device to: access (501 of FIG. 5) the cloud server through a first account display a user interface including a list of the contents based on the content application being executed; receive (502 of FIG. 5) a first input to at least one of the contents in the list of the contents stored in the memory of the electronic device through the user interface for selection of at least one shared content to be shared in the cloud server; after determining the at least one shared content, display (503 of FIG. 5) a list (606 of FIG. 6C) of at least one user generated account group, the at least one user generated account group including one or more external devices which have accessed storage space of the cloud server through a second account different from the first account; receive (504 of FIG. 5), through the user interface, a second input for selection of at least one of the account groups included in the list of the at least one user generated account group; and transmit (505 of FIG. 5) the shared content and information related to the selected at least one account group to the storage space in response to a third input received through the user interface; wherein the shared server is configured to transmit a push message to the group server in response to a change of the information stored in the storage space; wherein the group server is configured to transmit, in response to the push message, a notification providing notification of the change of the storage space to devices which have accessed the cloud server through an account belonging to an account group; and wherein the shared server is further configured to, as a synchronization operation, transmit shared content to the devices which have accessed the cloud server through a member account belonging to the account groups. a communication circuit; a processor; and a memory configured to store contents and a content application related to a content and electrically connected to the processor, wherein the memory is configured to store instructions that, when executed by the processor, control the electronic device to: access (501 of FIG. 5) the cloud server through a first account display a user interface including a list of the contents based on the content application being executed; receive (502 of FIG. 5) a first input to at least one of the contents in the list of the contents stored in the memory of the electronic device through the user interface for selection of at least one shared content to be shared in the cloud server; access (501 of FIG. 5) the cloud server through a first account display a user interface including a list of the contents based on the content application being executed; receive (502 of FIG. 5) a first input to at least one of the contents in the list of the contents stored in the memory of the electronic device through the user interface for selection of at least one shared content to be shared in the cloud server; after determining the at least one shared content, display (503 of FIG. 5) a list (606 of FIG. 6C) of at least one user generated account group, the at least one user generated account group including one or more external devices which have accessed storage space of the cloud server through a second account different from the first account; receive (504 of FIG. 5), through the user interface, a second input for selection of at least one of the account groups included in the list of the at least one user generated account group; and transmit (505 of FIG. 5) the shared content and information related to the selected at least one account group to the storage space in response to a third input received through the user interface; receive (504 of FIG. 5), through the user interface, a second input for selection of at least one of the account groups included in the list of the at least one user generated account group; and transmit (505 of FIG. 5) the shared content and information related to the selected at least one account group to the storage space in response to a third input received through the user interface; wherein the shared server is configured to transmit a push message to the group server in response to a change of the information stored in the storage space; wherein the group server is configured to transmit, in response to the push message, a notification providing notification of the change of the storage space to devices which have accessed the cloud server through an account belonging to an account group; and wherein the shared server is further configured to, as a synchronization operation, transmit shared content to the devices which have accessed the cloud server through a member account belonging to the account groups.