If your computer won't recognize it, then you'll probably need the help of a professional to try to recover any data on it.
It's probably not going to be worth paying a professional $20, $50, or more to recover a wallet that golds $12 worth of Bitcoin. Even those cables cost at least $5-$10, if not more. it will be worth it if Bitcoin's price explodes and increases by many X one day. Currently, it isn't. His best bet is to try it himself.
It's sad that after so many years people tend to rely on digital backups so much with no physical copy of important data.