It sounds like you’re looking for a description or a "pitch" for a portable version of Photoshop. However, it is important to be careful:

They are a common delivery method for malware, keyloggers, and ransomware.

Unlike the latest versions which require heavy GPU acceleration and massive RAM, CC 2018 can run smoothly on older 64-bit Windows 7 or 10 machines. Dangers of "Portable Free" Versions

: Using unlicensed software is a violation of copyright law. Individuals and businesses can face significant fines, legal action, or reputational damage. 3. Safe Alternatives to Access Photoshop