13 Replies Latest reply: May 15, 2012 12:25 PM by Pondini
whantk1 Level 1 Level 1 (0 points)

I've been using an ext hard drive to back up my Mac with Time Machine, but now suddenly it

doesn't work. I get this message:

"Mac OS X can't repair the disk "My Passport". You can still open or copy

files on the disk, but you can’t save changes to files on the disk. Back up

the disk and reformat it as soon as you can. Files can’t be copied onto the

backup disk because it appears to be read-only."

The HD manufacturer's reformat instructions warn all files on the HD will be lost during reformat.

How can I reformat without losing any of the files backed up on my HD?

MacBook Pro, Mac OS X (10.7.3)