If you already have a working Hub setup on another computer:
Is it possible to make Unity portable? - Questions & Answers
If you need to build for Android, iOS, or WebGL, remember to download the corresponding target support modules from the archive and extract them into the Editor\Data\PlaybackEngines directory of your portable setup. unity portable install
This method is best suited for advanced users who understand Unity's internal structure and are comfortable troubleshooting missing dependencies and license issues.
After completing the previous steps, you will have the installer files. On Windows, you can manually run the specific Unity editor installer from the command line: If you already have a working Hub setup
The Ultimate Guide to Unity Portable Install: Run Unity Anywhere
While there is no official "portable" version of the Unity Editor, you can create a functional portable setup by manually copying the installed editor files to a USB drive or external SSD. After completing the previous steps, you will have
By default, Unity attempts to save configuration logs, preferences, and licensing data to the host machine's C-drive ( %USERPROFILE%\AppData\Local\Unity ). To make the installation truly portable, you must force Unity to look inside its own directory. Create a Portable Launch Script
Create a batch script on your external drive to set environment variables and launch Unity Hub with the correct configuration: