Dsc2.7z.001 -

: If the files are named DSC2.7z.001 and DSC2(1).7z.002 , the extraction will fail. Rename them so they are perfectly sequential. Do you have all the numbered parts of this archive, or

: Use a tool that supports split 7-Zip archives. 7-Zip (Recommended, Free/Open Source) WinRAR Keka (for macOS) Step-by-Step Extraction Guide DSC2.7z.001

: If you only have part .001 , you must go back to the source and download the remaining segments. : If the files are named DSC2

: This usually means a part is missing or a download was corrupted. Check that the file sizes of all parts (except perhaps the last one) are identical. DSC2.7z.001