A file ending in is the second part of a split compressed archive. It does not contain viewable content on its own; instead, it must be joined with the other parts (starting with .7z.001 ) to be opened. How to Access the Content
How do I reassemble a zip file that has been emailed in multiple parts? (2).7z.002
To see what is inside, you must have of the archive in the same folder. A file ending in is the second part