It is often "virtualized" into a single folder or executable that can be run from a USB drive.
Below is a comprehensive essay detailing the dangers of using unauthorized portable repacks and the proper channels to access AutoCAD Civil 3D. civil 3d portable repack
Deliverables
But is such a thing real? And if it exists, should you use it? It is often "virtualized" into a single folder
Success criteria
If you need flexibility or are working with limited hardware, consider these safer, official methods: consider these safer