Downloading or distributing repackaged Adobe software is illegal. Because Photoshop is proprietary software, these modified versions violate Adobe’s terms of service. 3. Instability and Missing Features
While not "portable" in the USB sense, it is a lightweight, one-time purchase alternative that is far less resource-intensive than the full Creative Cloud suite. Conclusion Portable Photoshop Cs7
If you must have an offline executable on a USB drive, download from PortableApps.com . it is a lightweight
A free, web-based editor that mirrors the exact layout, shortcuts, and tools of Adobe Photoshop. It supports .PSD files, layers, masks, and smart objects directly inside your web browser. download from PortableApps.com . A free