For more information, you can find discussions on 7-Zip features in this ENCODE.SU Forum thread.
Right-click the first file ( .001 ) and select 7-Zip > Extract Here or Extract to... . The software will automatically merge the files and extract the contents [7-Zip Documentation]. SS-Jul-039_s.7z.002
Keep all parts together when transferring files to prevent losing one, which makes the set useless. For more information, you can find discussions on
If you receive an error, it is likely that one of the parts is corrupt or missing. Verify that all files were downloaded completely. Tips for Managing Split 7z Files For more information
You must have all parts of the split archive ( .001 , .002 , .003 , etc.) in the same folder to decompress the data [7-Zip Documentation].