explore the whole map and bricks and make sure they're in view distance, and then save
reasoning:
when in the server, you need to load the bricks from the server before you can save them
to load the bricks, go and view them, and they will be loaded until you leave the server
the server will only send you the data of bricks nearby you, since you only need to know about those
also note that while saving the bricks, it does not query the server for the save file, it does it all client sidedly
only events are queried from the server