Repacking is the process of compressing large video game files to make them easier to download. DODI is a reputable repacker who, like FitGirl, shrinks game sizes significantly—sometimes by 30-50% or more compared to the original, fully installed game.
If you want to play Forza Motorsport 7, there are safer, more ethical ways to do so than downloading a "DODI repack free" version. A. Check Third-Party Retailers for Key Codes