The file is a specific part of a multi-volume compressed archive created using the 7-Zip software . In technical terms, the .001 extension indicates that this is the first segment of a larger file that has been split into multiple pieces for easier sharing or storage. Understanding Split 7z Archives
: A split archive typically looks like a sequence of files: PapPrev.7z.001 , PapPrev.7z.002 , PapPrev.7z.003 , and so on. PapPrev.7z.001
Large files are often split into smaller "volumes" to meet file size limits on email, cloud storage, or physical media. The file is a specific part of a
How to extract files from a split 7zip archive ended by .001 and .002? PapPrev.7z.001