(e.g., a specific forum, a social media bio, or an email?)

This naming convention—"DSC" followed by numbers—is typically the default filename for photos taken on digital cameras (like Sony or Nikon). The .rar extension means these photos have been compressed into a single archive folder.

To help you find what you're looking for, could you tell me:

(e.g., are these event photos, a photography portfolio, or part of a data leak?)

Be careful when downloading .rar files from unknown sources, as they are often used to hide malware. Always scan them with antivirus software before opening.

(If you have a username or a site name, I can try a more targeted search.)