Valheim servers are using an auto-save feature to save the server. The problem with their system is the auto-save is triggered every 20mins, which could make you lose up to 20mins of progress if the server is stopped without being saved.
We recommend to manually save your server before stopping it.
To manually save your server world, you will need to follow these steps :
- Prerequesite: you need to be admin of your server. To become admin of your server, follow this simple tutorial
- Join your Valheim server
- Press "Enter" to write in the in-game chat
- Write "/save" and your world will be saved in no time