A file named is the first volume of a split (multi-part) RAR archive. To use it, you must have all subsequent parts (e.g., .part2, .part3) in the same folder before you can successfully extract the contents. Guide to Extracting "na15.part1.rar"
While "na15" could be a generic user-assigned name, it frequently appears in contexts related to: na15.part1.rar
The software will automatically detect and pull data from the other parts to reconstruct the original file(s). A file named is the first volume of