7z - Gf1

: Ideal for "all-or-nothing" backups where you rarely need to grab just one file.

: By default, 7z often uses a 2GB block. For maximum efficiency on huge datasets, you can set this to "Solid" (one block for the whole archive), but for better balance, limited block sizes (e.g., 128MB or 1GB) allow faster access to individual files. Gf1 7z

: Modifying or adding files to a solid archive is inefficient. 7-Zip often has to re-compress the entire block or archive to apply changes. : Ideal for "all-or-nothing" backups where you rarely