Med.7z

Set the Compression Level to "Ultra" and use the LZMA2 method.

It can unpack almost any archive format, including RAR, ISO, and MSI, though it primarily compresses into 7z, XZ, BZIP2, GZIP, TAR, and ZIP. Quick Tips for Best Performance MED.7z

It supports AES-256 encryption , making it a secure choice for protecting sensitive files. Set the Compression Level to "Ultra" and use

When moving large backups, users on Reddit suggest extracting files to verify them before deleting your originals, as .7z uses "solid compression" which can make recovery harder if the archive is corrupted. The dangers of 7-Zip and WinRAR - ThreatLocker though it primarily compresses into 7z