Unlike ZIP, 7z can treat multiple small files as a single continuous data stream. This allows the algorithm to find redundancies across different files, which is particularly effective for game ROM sets or software source code where many files share similar data patterns.
To further reduce size, even the list of file names and metadata (headers) within the archive can be compressed. 2. Technical Specifications Encryption
The LZMA2 method allows the compression task to be split across multiple CPU cores for faster processing. 3. Handling and Extraction
Supports strong encryption for both data and headers. Max File Size
This is the default "lossless" method used in 7z files. It provides a significantly higher compression ratio (30–70% better than standard ZIP) by using an improved version of the LZ77 algorithm with range coding.
To access the contents of a file like SS04.7z , specialized utilities are required because the format is not natively supported by all operating systems like ZIP is.