If you are hesitant to download a file, consider these legitimate alternatives:
The location depends on your Windows version: Live For Speed 100 Save Game Download
Alternatively, open LFS, go to "Options" > "Misc" and click "Open LFS folder." That will take you directly to the right directory. If you are hesitant to download a file,
Launch LFS. Go to "My Garage" or "Buy Cars." You should see green "Owned" tags on every vehicle. Your in-game coin counter might show a huge number (like 999,999) or zero, depending on how the save was hacked. Alternatively, open LFS, go to "Options" > "Misc"