The Best.7z -

: Enable Solid mode (Solid Block Size: Solid). This treats multiple files as a single continuous stream, which significantly improves the compression ratio for groups of similar files. Core Benefits of the 7z Format Does 7z compress better than zip? - Microsoft Community Hub

: Use LZMA2 , which is highly efficient for large data sets and modern multi-core processors. The Best.7z

: Set this as high as your computer’s RAM allows to improve the compression of repetitive data. : Enable Solid mode (Solid Block Size: Solid)