This is the trick. You do not want to run the installer normally.
Use an SSD-based USB 3.0 drive; running Unity over a slow USB 2.0 connection will be painful. 🛠️ Step 2: Grab the Hub unity portable install
D:\PortableUnity\ ├── Hub\ ├── Editors\ ├── Modules\ ├── Projects\ ├── Cache\DownloadCache\ └── Cache\PackageCache\ This is the trick
Project portability tips