How to access distributed files for downloading in Docker Swarm?

Question

linux

There is a group of servers combined into one cloud using docker swarm , all servers convert video files, but each of them converts these files and stores them, in this case, if the internal balancer sends a request to receive the file to another machine that does not have this file, the client will get a 404? or swarm itself knows on which machine there is a file and on which it is not? ( I don't think so, but what if!)