You will first need to locate your multiplayer save files on your PC.
By default, this should be in C:\Users\<UserName>\Zomboid\Saves\Multiplayer\
There should be a servertest and servertest_player folder.
You will want to compress these folders into a zip file.
You can then upload the zip file to the server using the file manager in the server's control panel.
Make sure the server is stopped before uploading the files.
It should be uploaded to .\Zomboid\Saves\Multiplayer\
If there is already servertest folder created, it is recommended you delete it first.
After the .zip file is uploaded, right-click the file in the file manager and click extract.
Depending on the size of your save, this may take a minute or two to complete.
