Because this is part of a split file, you cannot extract it by itself.
You must have all parts in the same folder (e.g., CAK.7z.001 , CAK.7z.002 , CAK.7z.003 , etc.). CAK.7z.002
Here is a useful guide on how to handle, use, and repair this specific type of file. 1. How to Extract "CAK.7z.002" Because this is part of a split file,
Do you have (e.g., .001, .003) in the same folder? CAK.7z.002
If you are still having issues with this file, please tell me: Are you getting a specific ?
Based on the file naming convention, is part of a split 7-Zip archive (often referred to as a multi-volume archive). It is not a standalone file, but rather the second part of a larger, compressed archive.