You cannot extract the contents of Npri_alpha045.part1.rar without the subsequent parts ( .part2.rar , .part3.rar , etc.).
Knowing these details will allow me to provide specific instructions. Npri_alpha045.part1.rar
This file, , is the first segment of a multi-part RAR archive. This indicates that the original file was too large and was split into smaller, more manageable pieces (part1, part2, etc.) for easier uploading, downloading, or storage [1]. You cannot extract the contents of Npri_alpha045
Use tools like WinRAR, 7-Zip , or The Unarchiver (for Mac). more manageable pieces (part1