Some repacks strip activation but use builds from 2021 or 2022. These may run in a limited "offline mode" but lack generative design, cloud simulation, and modern toolpaths. Calling them "new" is a lie.
Even if you manually move the folder, Fusion 360 will fail to launch or will revert to a trial/login loop.
Unlike SolidWorks or AutoCAD (which run locally), Fusion 360 relies heavily on Autodesk’s cloud servers. Even if you could launch the .exe from a USB drive, the software immediately attempts to:
While no official portable version exists, savvy users have created workable stopgaps: