It happens that I have created an extension of the Fjordur map and now I want to upload it as a mod, I have tried many ways and every time I upload the mod, it is uploaded without size 0.00B weight, so I don’t know what to do anymore
To upload a mod extension on a specific map, you must move your modified level to a folder inside the maps, specifically in TheIslandSubMaps.
Only move the level that contains your changes.
As for the assets like structures and materials, they should remain in your mod’s own folder,
then upload it as a Cook Game Mod.