The official launcher frequently checks file integrity, often "repairing" and re-downloading the full-sized files anyway. Safe Alternatives to Save Space

You can remove the Campaign, Special Ops, or Survival packs if you only play Multiplayer.

Using modified files can trigger Activision’s anti-cheat systems (Ricochet). Technical Challenges for MW 2019

Modern Warfare is an "always online" game. Compressed cracked versions often lack access to multiplayer, Warzone, or official updates.

Enable "On-demand Texture Streaming" in the graphics settings to download high-res assets only when needed.

Extreme compression can lead to "missing DLL" errors or frequent crashes during gameplay.