The file file32350.7z.001 is the initial volume of a multi-part, split 7-Zip archive that requires all subsequent sequential parts (e.g., .002 , .003 ) to be present in the same directory for successful extraction. Extraction is accomplished by using 7-Zip, ZArchiver, or command-line tools to open only the .001 file, which automatically handles the reconstruction of the entire dataset. For instructions on handling split archives in Windows, see Microsoft Q&A . How to Open and Extract .001 Files - Microsoft Q&A