Ss-mil-019_v.7z.001

: Ensure you have all sequential parts of the archive (e.g., SS-Mil-019_v.7z.001 , SS-Mil-019_v.7z.002 , etc.) in the same folder.

If you only have the .001 file without the other parts, you will likely encounter an "Unexpected end of data" error when trying to open it. How to Extract .7z.001 files - Microsoft Q&A SS-Mil-019_v.7z.001

: Selecting "Extract" on the first part will automatically combine and decompress all subsequent parts to reveal the original folder or file. : Ensure you have all sequential parts of the archive (e