Large datasets or software backups are often split into smaller pieces like this to:
Allow for easier downloading in sections rather than one massive, potentially unstable download. MadisonCS36.7z.002
The file is the second part of a multi-volume 7-Zip compressed archive. On its own, this file is just a "piece" of a larger dataset and cannot be opened or extracted without the other accompanying parts (at minimum, the first part ending in .001 ). How to use this "piece" Large datasets or software backups are often split