Third-party "portable" installers are frequently bundled with viruses, spyware, or ransomware. Since these files come from unverified sources, there is no guarantee of safety.
If you absolutely require genuine Adobe Photoshop, look into the official Adobe Creative Cloud Photography Plan. This tier is significantly more affordable than the full Creative Cloud suite and includes the latest version of Photoshop, Lightroom, and cloud storage, ensuring you always have secure, up-to-date software. Conclusion adobe photoshop cs6 portable free download softonic portable
Downloading modified software from third-party hubs like Softonic carries several high-level risks: Is Photoshop CS6 returned legal? - Adobe Community and cloud storage