: Most commonly uses the LZMA or LZMA2 algorithms, which provide a significantly higher compression ratio than standard ZIP files.
To "look at" or report on the specific contents of mna.7z , you must use an archive manager: :
The file mna.7z refers to a compressed archive in the , a high-compression file type typically managed by the open-source 7-Zip utility . Technical Summary of 7z Files
: Supports robust AES-256 encryption. In some configurations, both the file contents and the filenames themselves can be hidden until a password is provided.
Use the official 7-Zip File Manager (7zFM.exe) for a graphical interface.