Always ensure your source is reputable to avoid malware often bundled with "repacked" or portable software. Conclusion
While the portable version is convenient, keep the following in mind:
Adobe Photoshop CC 2019 (version 20.0.4.26077) remains a popular choice for designers and photographers who need a powerful, stable creative suite that can run on both 32-bit (x86) and 64-bit (x64) architectures. The portable version, in particular, offers the flexibility of using industry-standard tools without the overhead of a full system installation.
It doesn't run background "Updater" services or Creative Cloud sync processes, saving CPU and RAM for the actual design work. Precautions and Performance Tips
A dedicated editing window that allows you to choose exactly which pixels to use for fills, providing much more control than previous versions.