Versions found online under this name are almost always or "repacks" created by third parties. Using them comes with several specific dangers:
You can download the (single HTML file) and run it from a USB stick without internet. download adobe photoshop 2020 portable
The portable version of Adobe Photoshop 2020 offers many of the same features as the official version, including: Versions found online under this name are almost
Because of these dependencies, truly portable versions are and often dysfunctional. including: Because of these dependencies
Adobe does not offer an official "portable" version of Photoshop 2020 or any other release. Versions of Photoshop labeled as "portable" found online are unofficial, modified versions that are often used to bypass licensing. Understanding "Portable" Photoshop