The most pressing issue regarding the download of modified software binaries like "Photoshop Portable CS4" is security. Because these files are unauthorized modifications hosted on personal Google Drive accounts, they are completely unverified.
"Photoshop Portable" is a well-known hack created by third parties to bypass licensing. It is not a legitimate Adobe product. Copyright Violation: download photoshop portable cs4 google drive
Since it's a portable version, you don't need to install it. Simply extract the files and run the software directly. The most pressing issue regarding the download of