Be wary of downloading compression tools from unofficial sites, as some versions of "7-Zip" from non-official URLs have been linked to trojans.

Always run a scan on unknown .7z files before extraction, as they can contain executable scripts or malware hidden within the archive.

Breaking massive folders into smaller, manageable parts (e.g., FZNJ06.7z.001). How to Open FZNJ06.7z

The official, free utility is 7-Zip for Windows. Alternatives include WinZip or Unzip One .