The l (list) command provides a detailed breakdown of every file inside the archive, including their original size, compressed size, and modification dates. or PowerShell. Navigate to the folder containing your file.

💡 : If you are using a Linux-based system, you can discard standard messages and only report errors to a separate file by using 7z l shaving.7z 1> report.txt 2> errors.txt . Does 7z compress better than zip? - Microsoft Community Hub

: A detailed table of every file and folder within the .7z file. Detailed Data Points

To calculate the compression ratio for your report manually if it's not explicitly totaled, you can use the values from the bottom of the list output: :