WD My Passport Ultra 1TB

The disk is working OK with any PC (windows XP or 7).

I tried to connect to a McBook Air, and I can see the disk and their content without problem, also it permits to copy from the WD to the Mac… But it doesn’t permit to bakcup any file from the Mac to the WD.

What is happening and how I can fix this problem. Thanks.

The default file system is NTFS, which is a Windows-based file system that only allows read access on Mac OS systems. You will need to reformat the hard drive if you would like to use it on a Mac. Please visit the following link for additional information: