Installing a save file for a Codex release is slightly more technical than the Steam version because the files are stored in a different location based on your Windows user profile.

Save files often include settings profiles. You may need to adjust your graphics, controls, and audio settings again.

Sometimes, the game might not recognize your new save file. Here are solutions to the most common problems:

C:\Users\Public\Documents\Steam\CODEX\1551360\

Start Forza Horizon 5. The game should detect the new save file and load the 100% completed game. Important Tips and Troubleshooting

C:\Users\[Your Username]\AppData\Local\XboxLiveGDK\9E2FDEB9\

Navigate to the CODEX save path: C:\Users\Public\Public Documents\Steam\CODEX\1551360\remote\1638 .

Prestige levels and driver ranks fully maxed out. How to Install a 100% Save Game on Codex Version

Every vehicle in the autoshow, including rare rewards and barn finds.

This post explains what a "Codex save game 100 upd" refers to for Forza Horizon 5, how to use Codex save-game files to reach 100% progression, risks involved, and step-by-step instructions to apply an updated (upd) save. This is intended for single-player/local saves only.

To successfully swap your current save with a 100% file, follow these steps according to community methods from Reddit and YouTube :

Choose when prompted by Windows. Troubleshooting Common Errors "Invalid Profile" or "Load Failed" Error