Help!!! how to open .mdf n .mds files?

Cchen

after dowload games, how to open it's .mdf n .mds files?0 ]3 G, L9 n. Y5 m6 F$ h- g
i cant open it?2 }( B6 L! m2 Q" l$ v
pls teach me...
9 Z9 u/ B) i7 `0 qTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。tq...