Rus-8.7z.001

: The .001 suffix marks this as the starting piece. You generally cannot open it successfully without having all subsequent parts (e.g., RUS-8.7z.002 , RUS-8.7z.003 ) in the same folder.

: Use software like 7-Zip (official), WinRAR , or PeaZip . RUS-8.7z.001

: Ensure every numbered segment belonging to the "RUS-8" set is in the same directory. RUS-8.7z.001