A file with these characteristics generally indicates it was compressed using the or LZMA2 algorithm with "Ultra" or manual high-end settings.
: To extract via terminal, use the command: 7z x 27n.7z 27n.7z
: Most 7z archives use LZMA (Lempel-Ziv-Markov chain algorithm) , which is known for having a higher compression ratio than the standard ZIP format. A file with these characteristics generally indicates it