7-Zip is a file archiver with the highest compression ratio. The program supports 7z (that implements LZMA compression algorithm), Oracle Help Center How To Open .7z Files on Android
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 mna.7z
Use the official 7-Zip File Manager (7zFM.exe) for a graphical interface. 7-Zip is a file archiver with the highest compression ratio
Alternatively, WinZip and Trend Micro's Unzip One both support the 7z format. : Alternatively, WinZip and Trend Micro's Unzip One both
: Supports robust AES-256 encryption. In some configurations, both the file contents and the filenames themselves can be hidden until a password is provided.
ZArchiver is a common choice for mobile users to extract and view 7z archives. 7z - man pages section 1: User Commands
The macOS Finder can often unpack these natively, but third-party tools like Commander One are required to create them or view contents without full extraction. :