How to copy songs or pictures from PC to Phone's internal storage on Marshmallow ?

A

AC Question

Device-Micromax Canvas A1
Internal Memory - 4 GB(usable-2.23 GB), External MicroSD card-8 GB
Recently upgraded my Android OS to Marshmallow. It gave me an option to use my MicroSD card as internal storage. After using my memory card as internal storage, the problem now is that I can't see my Memory card when I connect the phone to PC. Unable to transfer any file to phone or copy any file from phone. Please Help. Thanks in advance.