Here is an informative look into what that file represents and how it is used. The Anatomy of "0001-0020.part3.rar"
This file is the third installment of a large collection that has been split into smaller, manageable chunks (likely 20 parts total, based on the 0001-0020 naming convention) [1]. 0001-0020.part3.rar
It seems you're asking about the file . This filename structure is a classic indicator of a multi-part archive created with WinRAR [1]. Here is an informative look into what that