I have over 3 terabytes of movies on 2 external hard drives that I used on a Windows pc. I recently gave the pc to my son and now setup the MBP as my desktop with the externals attached. I can see the drives and access view the files but can not save to them. I read several post that say I have to reformat the drives for the mac to copy to them. Just wondering if anyone has a work around because I would have to buy another 3 terabytes to keep the files that I have.....any help would be greatly appreciated!