Hello Zanaelf
Jan 12, 2012 - I have a question: I possess a Passport Essential (USB 3.0) and I previously used it with my macbook pro and now I changed back to windows.
If you look at the format of the external hard drive, it is probable setup to NTFS and is something that Macs can read and copy from but cannot write to it. The only way you can do that is to reformat the drive to either so that it will be for Macs to write to or you can format it to FAT and it can read and write to both. Check out the articles below for more information. Also check out the other discussion that I provided as another user found a 3rd party piece of software that may assist you further if you do not want to reformat the drive.
Regards,
-Norm G.
May 16, 2014 9:33 AM