just get a refund................your not allowed to at least in the usa if that is where you are, to convert your game disk to a digital release...........................some places are but most are not setup to allow large external device downloads, you'll have to call and check, if you don't have broadband............................those ps5 games are pretty large.
also, they don't have SSD drives with the games on them you can purchase an access key to download just that one game to your PS5, MAYBE in the future.................its really not a good idea to use disk drives anymore.
you may have to return your entire PS5 console for a refund over the Demon Souls game.................if that is a major issue,...............the problem of game distribution will not be solved this game generation................you could maybe try something hand held.
A 70 Dollar Demon Souls game, cost more then a 500 GB SSD External Drive.............considering the disk drive method is no longer efficient just though i'd mention that!!!!!!!!!!!!!!!!!