The filename indicates that you are dealing with the second part of a split compressed archive created with 7-Zip .
Before you try to open anything, ensure that of the archive are in the same folder. 1 (7)-7 & 1 (8)-8.7z.002
You will need a utility that understands split archives. (Windows) or Keka (Mac) are the most reliable tools for this. Right-click on the FIRST file (the one ending in .001 ). Select 7-Zip > Extract Here (or "Extract to..."). The filename indicates that you are dealing with
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. (Windows) or Keka (Mac) are the most reliable tools for this
If the extraction fails halfway through, one of the volumes might be damaged. Try re-downloading the specific part that caused the error.
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.