Backup.7z

: Because similar data patterns across different files are compressed together, solid archives significantly reduce file size, especially for backups containing many small or similar files.

-ms=2g : Limits solid blocks to 2GB to balance compression and access speed. 7z(1) — p7zip-full — Debian stretch backup.7z

When creating a backup, this feature provides several benefits and trade-offs: : Because similar data patterns across different files

In the 7-Zip GUI , you can enable this by checking in the Add to Archive dialog. In the command line, use the -ms switch: -ms=on : Enables solid mode (default for 7z). solid archives significantly reduce file size