A relay server includes: a communication device communicable with a recording apparatus, a conversion server which converts image data, and a storage server which stores the image data; and a controller. The controller is configured to: acquire, from the recording apparatus, a storing instruction for storing converted image data into the storage server, the converted image data being image data converted by the conversion server; acquire account identification information for identifying an account of the recording apparatus in the storage server, from the recording apparatus via the communication device; acquire the converted image data from the conversion server via the communication device; and transmit the acquired converted image data and the acquired account identification information to the storage server via the communication device in a state in which the acquired converted image data and the acquired account identification information are associated with each other.