Assassinscreedvalhalla.part4.rar -

This usually means you are missing one of the other parts or the download for part4 was interrupted.

Split archives from unofficial sites are a common vector for viruses, trojans, or "cryptojackers." AssassinsCreedValhalla.part4.rar

Many third-party RAR files are password-protected. The password is usually found on the site where you sourced the link. This usually means you are missing one of

If "part4" was downloaded from a different source than "part1," the archive headers may not match, leading to a "Checksum Error." leading to a "Checksum Error."