Go to the official Autodesk Fusion 360 website.
: During the installation process, look for the option to change the installation path and select your external drive. Fusion often defaults to the %localappdata% fusion 360 portable download install
Autodesk actively pursues piracy. Using a modified portable version violates their Terms of Service. For students, this can mean losing access to the free educational license forever. For professionals, it can mean lawsuits, fines (up to $150,000 per software title under the DMCA), and being banned from all Autodesk products. Go to the official Autodesk Fusion 360 website