: The .7z in the name indicates it was compressed using 7-Zip .
: Right-click the .001 file and select "Extract Here" or "Extract to [Folder Name]" .
7-Zip will automatically recognize the sequence and join all parts back into the original high-definition video or image set.
: You must have all subsequent parts (e.g., .002 , .003 , etc.) in the same folder as the .001 file.