You cannot open or "write up" this file in isolation. To access the contents, you must have all parts of the set (e.g., .001 , .002 , .003 , etc.):
: The data is compressed using the 7-Zip (LZMA) algorithm. SS-MaiSS-014_s.7z.002
: The software will automatically detect and link the subsequent parts (including your .002 file) to reconstruct the original data. You cannot open or "write up" this file in isolation