A management system, comprising: an operation request reception unit configured to receive a request for an operation for a specific device of one or more image capturing devices from a communication terminal used by a user for who user authentication has been successfully performed by the management system, the one or more devices and the communication terminal being configured for communicating with each other to execute an event managed by the management system, wherein the event is a remote communication provided by the management system; a storage unit configured to store operation identification information and access information in association with each other, the operation identification information identifying the requested operation associated with the request received by the operation request reception unit and the access information being associated with the user and used to access external storage; and an upload processing unit configured to upload data acquired by the specific device according to the requested operation corresponding to the operation identification information to the external storage using the access information associated with the operation identification information; wherein the request is a capturing request to capture a captured image obtained by the specific device, and the upload processing unit is configured to upload, to the external storage, the data that is captured image data acquired according to the requested operation, wherein the storage unit is configured to temporarily store an authorization token for the external storage of the user in response to the request from the user, wherein the upload processing unit is configured to upload the data acquired by the requested operation to the external storage corresponding to the user using the temporarily saved authorization token. an operation request reception unit configured to receive a request for an operation for a specific device of one or more image capturing devices from a communication terminal used by a user for who user authentication has been successfully performed by the management system, the one or more devices and the communication terminal being configured for communicating with each other to execute an event managed by the management system, wherein the event is a remote communication provided by the management system; a storage unit configured to store operation identification information and access information in association with each other, the operation identification information identifying the requested operation associated with the request received by the operation request reception unit and the access information being associated with the user and used to access external storage; and an upload processing unit configured to upload data acquired by the specific device according to the requested operation corresponding to the operation identification information to the external storage using the access information associated with the operation identification information; wherein the request is a capturing request to capture a captured image obtained by the specific device, and the upload processing unit is configured to upload, to the external storage, the data that is captured image data acquired according to the requested operation, wherein the storage unit is configured to temporarily store an authorization token for the external storage of the user in response to the request from the user, wherein the upload processing unit is configured to upload the data acquired by the requested operation to the external storage corresponding to the user using the temporarily saved authorization token.