My Passport, using as a back-up disk for Macbook, want to use it for photo/video/media storage

I have a My Passport that I have been using to back-up my Macbook pro.  My Macbook Hard Drive is almost full of pictures, video and music.   Is it possible to use My Passport to store this media and if so what are the steps I need to follow to make that happen?  I have tried dragging and dropping but that doesn’t work.  Does the formatting need to be changed?

Hello,

Check out the links below.

How to partition and format a WD drive on Windows (8, 7, Vista, XP) and Mac OSX

How to copy or move files or folders to a different hard drive on a Mac