Hlp plsss some one pls help me to solve this plobrem?

Help Guy,I Cant Read Folder Call:Music,Picture,DCIM,And many more,i juz can read theme ,website only..In my phone,i can read it,But when i connected My phone into Computer using USB,i Cant find any folder of Music,Picture,DCIM,And many more,.Any Idea Pls Tell me,ist hidden ?or what plobrem,Please Teach Me How To Solve