Because of solid compression, all parts (001, 002, 003, 004, 005) must be present in the same folder. If you are missing one, or if one is corrupt, the entire archive cannot be extracted.

Do you have (v1.7z.001 to v1.7z.005) in the same folder? Are you on Windows, Mac, or Android ? Knowing this will let me give you the exact steps.

To extract v1.7z.005 , you must have the full sequence. The best practice is:

The file is the fifth part of a split, compressed 7-Zip archive. It is not a standalone file and cannot be opened individually to extract its contents. Such files are typically generated when a large file or folder is divided into smaller pieces (v1.7z.001, .002, etc.) to make downloading or storing them easier.