All parts must have the exact same name except for the part number (e.g., don't change 1208_1_RP.part1(1).rar ).
Use a program that supports multi-part RAR files, such as WinRAR , 7-Zip , or PeaZip . 1208_1_RP.part1.rar
If you are missing even one part (e.g., you have Part 1 and Part 3 but not Part 2), the extraction will fail. All parts must have the exact same name