"Archivo de Descarga 900.7z" is not a recognized cultural phenomenon, specific software package, or historical artifact. In Spanish, the name translates literally to
It likely contains a directory tree of smaller files that require specific software to execute or read. Critical Safety Note Archivo de Descarga 900.7z
7-Zip is chosen when the creator needs to shrink large files (like a database) more efficiently than standard .zip . "Archivo de Descarga 900
If you have downloaded this file and are unsure of its origin, Use a service like VirusTotal to scan the archive or the URL where you found it. To provide a "deep essay" on the actual contents, I would specific software package