Downloading "highly compressed" versions of Adobe Photoshop from unofficial sites is generally unsafe and illegal . These files are often "cracked" versions that can contain malware, viruses, or "time bomb" trojans designed to infect your system later.
Instead of risky third-party downloads, consider these safe and legal methods: Official Adobe Options Is it okay to download an older version of Photoshop? Adobe Photoshop Highly Compressed Download For Pc