Beginner Level 2

since past 4-5 days i am not able to open my USB directly from the status bar ( scroll status bar click on the USB icon and it shows explore) although my USB do get detected and if  i have to access the USB than i have to go to the files manager and than i can open the USB storage device which earlier was not the case. 

kindly give me the solution.


i have already tried developer option but of no use.