Hi everyone, I am having some issues with time machine on my MacBook Pro. I have been using time machine on an external hard drive which worked for a month or so and then time machine said it could no longer backup to the drive as it needs to be repaired. When I try to repair the drive, disk utility says it cannot backup the drive and it needs to be formatted. I thought it was a hard drive issue so I picked up another external drive. Again, after about a month, I got the same issue. I can't keep erasing these drives. Is this a common problem? Is there a solution? Is it possible the drives are faulty or perhaps not being "ejected" correctly? I hope someone here has faced this issue in the past. Thanks in advance for your help!