I have a macbook pro and I am trying to put files onto my WD hard drive and it will not let me do it. It says that it cannot be modified and i’ve been researching it all day. I don’t want to do the directions that make me go to disk utility and reformat it, because the files from my moms business are all on this hard drive that I’m borrowing. I’ve tried downloading a couple of third party softwares but those weren’t really working either. I’m pulling my hair out trying to get this project done…can anyone please help me?