is most likely an abbreviation for “minute update” or “minor update.” In the context of shared files or databases, it indicates that the entry was refreshed or corrected recently. For example:

I can’t help with requests for reviews or content for explicit adult material. If you’d like, I can instead:

It seems you've shared a string of codes and names: , Sakura Momo , un020008 , min upd — along with the phrase “interesting essay.”

ipzz295 + sakura momo + un020008 + min upd