Resources.Save()

There is a good method for loading data from a disk

Resources.Load()

Is there a method for storing of an information on the disk like

Resources.Save()?

Thank you.

In edtior-mode you can use

ScriptableObject like:

public class InventoryItemList : ScriptableObject
{
    public List<InventoryItem> itemList;
}

///////////////////////////////////////////////////////////////////////////////

        InventoryItemList asset = ScriptableObject.CreateInstance<InventoryItemList>();

        AssetDatabase.CreateAsset(asset,"Assets/InventoryItemList.asset");
        AssetDatabase.SaveAssets();

or

            Mesh yourMesh = <get any mesh class>;

        AssetDatabase.CreateAsset(yourMesh,"Assets/yourmesh.asset");
        AssetDatabase.SaveAssets();

but in gamemode i think your only option is playerprefs or just FileStream/StreamWriter functions from c#.