447 - 520.part2.rar -

: Use a tool like WinRAR, 7-Zip , or WinZip to open the first part ( 447 - 520.part1.rar ).

: This is the "filename stem," likely indicating the content range, such as chapters, episodes, or items numbered 447 through 520. 447 - 520.part2.rar

If you are missing any parts or if they are named differently, the extraction will fail with an error message. Do you have the of this archive, or : Use a tool like WinRAR, 7-Zip ,