Some unofficial versions may be hardcoded to use malicious exit nodes that can inject content or steal data. Official & Safe Way to Create a Portable Tor Browser

When prompted for an installation folder, click Browse and select your USB drive instead of the default desktop location.

The Tor Project does officially distribute the Tor Browser in .rar format. While you may find third-party sites offering "Tor Browser Portable.rar," downloading from these sources is highly discouraged due to significant security risks, including malware or compromised privacy.

Some users utilize the PortableApps version , which is a common community-maintained alternative, but even then, the Tor Project’s official support for manual portability is the safest route. Making Tor Browser portable - Getting started

You can create your own portable version using the official installer from the Tor Project Download Page :

It is highly recommended to verify the download's signature to ensure the file hasn't been tampered with.