The 1.0 server converts an Early Access world on its first boot. The savedata2-migration log lines from a real server, which files in savegame are involved, what to do if the lines never appear, and why the update is one-way.
One .wld file: where worlds live on Windows and Linux, getting one out of Steam Cloud, placing it where worldpath points, why the name is the identity, and the two moves that do not exist — from tModLoader, and from a console.
The savegame folder, the 10-minute autosave, why characters never move (Keen stores them client-side), the four-step transfer, what goes wrong, and the backup to take before and after.
One .sav file and a rule about its name: the Windows save path, the server’s Savegames folder, why you must not rename the file, and why world rules travel in the save rather than the INI.
Two files and a name: where the .db and .fwl live on every platform, where to put them on the server, the password rule that blocks the start, and why characters come along for free.