Npri_alpha045.part1.rar -

Ensure you downloaded this from a trusted source to avoid malware or ransomware.

Here is an informative overview structured as a blog post, explaining what this file likely is, how to handle it, and best practices for security.

You cannot extract the contents of Npri_alpha045.part1.rar without the subsequent parts ( .part2.rar , .part3.rar , etc.).

If you only have .part1.rar and are missing the other parts, the extraction will fail. Ensure you have downloaded the entire archive set. To help you further, could you tell me: Where did you download this file from? Are you seeing an error message when trying to extract it? Do you have the other parts (part2, part3, etc.)?