Large files are often split into smaller "volumes" to make them easier to upload or download. The .002 suffix indicates this is the second part of a multi-part archive.
Right-click on the first file ( .001 ) and select "Extract Here." The software will automatically pull data from the .002 file to complete the process. Gemination New Catalogue 2020.7z.002
If you have encountered this file on a forum, file-hosting site, or via a peer-to-peer network, please exercise caution: Large files are often split into smaller "volumes"