: The 7z format uses the LZMA and LZMA2 algorithms, which typically offer 30–70% better compression than standard ZIP files.
If you downloaded "BelyFirst.7z" from an untrusted source, be cautious: BelyFirst.7z
Since ".7z" files can contain anything—from software installers to private documents—it is impossible to review the content without access to the file itself. However, here is a technical review of the used by this file: Technical Review: 7-Zip Archive Format (.7z) : The 7z format uses the LZMA and
: It can handle massive file sizes (up to 16 exabytes) and supports Unicode filenames. BelyFirst.7z