A storage device configured for connection with a host includes; an output unit configured to provide at least one storage device operating state indication to a user, an input unit configured to accept at least one user input, a main memory configured to temporarily store data received from the host, a storage configured to store the data in non-volatile memory space, and a controller configured to execute a backup operation in response to a user input accepted by the input unit, transfer data from the main memory to the storage during the backup operation, and provide a storage device operating state indication through the output unit during execution of the backup operation.