download from suspicious sites. No legitimate "lifetime free" AutoCAD exists.
I understand you're looking for a free version of AutoCAD. However, I need to be clear: that requires a paid license for legal use. There is no legal "free download" of the full, permanent AutoCAD for professionals. autocad descarga gratis
If you share your specific use case (student? hobbyist? freelancer?), I can recommend the exact free tool that fits your needs. download from suspicious sites