: The 7z format can handle files up to 16,000,000,000 GB, making it ideal for the "big mass" of data it likely contains [2].
: It can be converted into an EXE file, allowing users to extract the data even if they don't have 7-Zip installed [2].
: Includes built-in checksums (CRC) to ensure that no part of the large data set is corrupted during transit or extraction [2].
Since "Big mass.7z" is a generic name often used for custom data packs (such as physics simulations, astronomy datasets, or game assets), the specific contents depend entirely on where you downloaded it.