Forza Motorsport 4 needs its latest Title Update (TU) to recognize newer DLC cars. If you play offline, the game will ignore the USB content. Ensure your console connects to the internet to grab the final title updates, or manually inject the Title Update file into the 000B0000 folder on your USB drive using Horizon. 📋 Summary Checklist for Success

Click on the button on the right-hand tool menu. Browse to your downloaded Forza 4 DLC files. Select the files and click Open .

While still inside the main Hard Drive's Forza Motorsport 4 folder, locate and all remaining items except your main game installation. This includes broken title updates, partial DLC downloads, and older marketplace configuration files.