To run FileZilla Pro or the free client portably from a USB drive or local folder without installation, follow these steps from the official Wiki : FileZilla Pro Download
: You can download a standard ZIP package (without an installer) directly from the official download page by selecting "Show additional download options". Download File Zilla Pro Portable zip
: Available only as an installer for Windows, macOS, and Debian Linux via the FileZilla Pro Website or authorized stores like the Microsoft Store . To run FileZilla Pro or the free client
Official "FileZilla Pro" does have a dedicated portable version, as it is a paid, subscription-based service. However, you can create your own portable version by downloading the official ZIP package and modifying its configuration. Download Options & Status Report However, you can create your own portable version
: PortableApps.com provides a pre-packaged portable version of the free client, but they do not provide FileZilla Pro. How to Make FileZilla Portable (Self-Reported Method)