Each part (except the last one) should usually be the exact same size. If part2 is significantly smaller than part1 , the download might be corrupted.
Do not rename the files. They must keep the .partX.rar sequence for the software to recognize them as a set.
If the archive asks for a password, it is usually provided on the website where you originally found the link.
Standard zip tools often struggle with split RAR files. Use one of these specialized programs: (Windows): The native tool for .rar files.
If any part is missing, the extraction will fail with an "Unexpected end of archive" error. 2. Use the Right Software
(Windows/Linux): A free, open-source alternative that handles RAR parts well.