Ss-mil-021_v.7z.002 -

on the first file in the sequence (the one ending in .001 ). Select 7-Zip > Extract Here (or use WinRAR/The Unarchiver).

: Ensure you have all segments of the file. A split archive usually looks like this: SS-Mil-021_v.7z.001 SS-Mil-021_v.7z.002 (The file you have) SS-Mil-021_v.7z.003 (and so on...) SS-Mil-021_v.7z.002

The software will automatically detect part .002 and combine them into the final file. on the first file in the sequence (the one ending in