The file isn't a single story, but rather a "split" archive file—specifically the first volume of a larger compressed package. Because it ends in .001 , it acts like the first chapter of a book where the other chapters are missing. The Story of a Split Archive
: Ensure all parts (001, 002, etc.) are in the same folder. NFE104_reduced.7z.001
In the world of data, large files are often sliced into smaller pieces to make them easier to send over email or upload to cloud storage. The file isn't a single story, but rather
: Your file, NFE104_reduced.7z.001 , is the "header" or the beginning of the sequence. It contains the map of what is inside the entire archive. The file isn't a single story