I have my MacBook Pro backed up with Time Machine on a WD external passport drive. Time Machine no longer recognizes the drive and I cannot open any other files that are on it. I tried disk repair, but get the error message "Could not unmount Disk". Anyone know what this means or what to do next?
Disk Utility can have some problems if the partition is corrupted. DiskWarrior can usually repair any issues with the drive though.