: Increase this (e.g., to 64MB or higher) if you have enough RAM. A larger dictionary allows the archiver to find more patterns in the data, leading to a "better" (smaller) piece of compressed data.
To create a high-quality 7z archive with maximum compression, use these settings in the 7-Zip GUI or online creators like ezyZip: : Select 7z . CGV.7z
You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. Creating Encrypted ZIP files with 7-Zip - DCU : Increase this (e