Use WinRAR (Windows) or The Unarchiver (Mac). 7-Zip is also a highly effective, free alternative.
On the other hand, the benefits of using compressed files like "juq673upart04rar" include: juq673upart04rar
This indicates that the file is the fourth volume in a larger set. To extract the contents, you generally need all parts (Part01, Part02, etc.) in the same folder. Use WinRAR (Windows) or The Unarchiver (Mac)