1. A terminal device, comprising at least one processor and at least one non-volatile computer readable medium including computer program code, the at least one non-volatile computer readable medium and the computer program code configured to, with the processor, cause the terminal device to at least: transmit, to a server device, when one or more pieces of stored data each being an entity of a unique bitstream are respectively stored in different modes in one or more data storage devices, identification data for identifying all of the pieces of stored data capable of restoring the unique bitstream; receive, from the server device, bitstream use feature information indicating a feature during use of the unique bitstream indicated by the identification data, and stored data entity information indicating an entitative feature of each of the one or more pieces of stored data capable of restoring the unique bitstream indicated by the identification data; determine, when the bitstream use feature information includes quality information during use of the unique bitstream, the stored data entity information includes data compression scheme information of the unique bitstream, and the quality information is not within a prescribed range, that none of the pieces of stored data identified by the identification data is to be acquired; and determine, when the quality information is within the prescribed range and the data compression scheme information matches at least one piece of prescribed data compression scheme information, that at least one piece of stored data corresponding to the stored data entity information including the matching prescribed data compression scheme information is to be acquired from the one or more data storage devices.