Saving data to WD Passport on a Mac

Trying to save existing data from MacBook onto a WD My Passport. External hard drive is displayed on MacBook, and can read-only. Pop-up window reads: “cannot be modified” when I try to add files onto passport. What changes do I need to make to My Passport to allow me to save data?

Hello,

You will need to reformat the drive to make it fully compatible with the MAC.

Check the following link for full instructions on how to do that.

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