Right-click on the first file ( .001 ) and select "Extract Here" [2].

A file named is the second segment of a multi-part compressed archive created using the 7-Zip utility . Technical Specifications

You cannot open a .002 file individually. To access the contents, you must:

Backup software often uses randomized strings for security and to avoid filename collisions.

This indicates a "split" archive. Large files are often broken into smaller pieces (e.g., .001 , .002 , .003 ) to bypass file size limits on certain storage systems (like FAT32) or to make uploading/downloading more manageable [1, 2].