The file SS-Nit-029_v.7z.001 is the first segment of a split 7-Zip archive that requires all subsequent numbered parts (e.g., .002, .003) to be in the same folder for extraction. Commonly associated with large game mods, asset packs, or software distributions, this archive can be accessed by using 7-Zip to extract the first file, and it is recommended to scan the archive for malware before opening. You can find more information and tools at 7-Zip.