It seems like you are providing instructions on how to install a mod for Farming Simulator 25. It's important to follow the steps correctly to ensure that the mod works properly in the game.
1. Firstly, as you mentioned, it's always a good practice to make a backup copy of the folder or files you are modifying. In this case, you are copying the "Securite" folder as a precaution.
2. Next, locate the "Grass" XML file that you want to add to the game. Copy or drag this file to the appropriate directory in the game's installation folder.
3. The path you mentioned indicates that you should place the "Grass" XML file in the following directory within the Farming Simulator 25 installation folder:
D:/Steamlibrary/Steamapps/Common/Farming Simulator 25/Data/Foliage/Grass
By following these steps, you should be able to successfully install the grass mod in the game. Remember to launch the game and check if the mod is working as intended. If you encounter any issues, double-check the installation steps and make sure everything is correctly placed in the game directory.