Multiplayer save file to dedicated server (Multiple Level)

Can you guys help me I don’t know what to do I’m totally stuck.

I was thinking to .sav each player’s data to server side/dedicated computer. But the problem is server has only 1 map so,

How can i save/load data in “MAP_main menu” & “MAP_Game” both level?

I was thinking to use 2 server(in 1 dedicated server) and assign them port for each level;

like 7777 for main menu - 7778 for game map

and no matter which map the player is on, the save file can be stored to the server.
But I heard that steam doesn’t work that way like multiple server in same machine,
Is there any solution for this without using sql?
I’m not familiar with this things, thank you!