The filename indicates that you are dealing with the second part of a split compressed archive created with 7-Zip .
Since the file name itself appears to be a specific, possibly auto-generated title from a personal backup or a niche download, a blog post on this topic should focus on and how to successfully extract the data within. 1 (7)-7 & 1 (8)-8.7z.002
The file is useless on its own, but it’s a vital component of your full download. Find its "sibling" files, put them in one folder, and extract from part .001 to access your content. The filename indicates that you are dealing with