It likely contains a directory tree of smaller files that require specific software to execute or read. Critical Safety Note
Generic "Download" filenames in compressed formats are a common tactic for distributing malware. If you found this file on a peer-to-peer network or an unverified site, it may contain malicious scripts. Analysis of the File Structure The use of the .7z format suggests the contents are either: 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 . It likely contains a directory tree of smaller