Standard Windows "Extract All" may not recognize split .7z files. Use 7-Zip or WinRAR. To help you further, could you tell me:
Put all segments into the same directory on your computer. Extract the First File: Right-click on LLNS234.7z.001 . Select 7-Zip > Extract Here . LLNS234.7z.004
Are you getting a (e.g., "Unexpected end of data")? Do you have all the other numbered parts in the sequence? Standard Windows "Extract All" may not recognize split
If part .004 is missing or corrupted, the entire archive will fail to extract. LLNS234.7z.004