You can create an archive that does not require 7-Zip to be installed on the recipient's computer to open.
Choose a compression level (Ultra is best for size, but slowest). Optional: Set a password for security. Click "OK". 4. Advanced Features fablow.7z
To help you further with this file, could you tell me: Are you trying to open (extract) it or create one? Are you on Windows, macOS, or Linux? Is it password-protected? Igor Pavlov & 7-Zip: Essential Guide - Ftp You can create an archive that does not