Ive been using my Time Machine for almost 3 years without any problems. It's a 3 TB LaCie. This week it has decided to stop backing up my work. I tried repairing the disk and unmounting and remounting the disk a number of times but it's not working. After remounting the disk, it runs for about 10 minutes and then stops. Each time I then try to manually run a backup it immediately gives me an error message. The initial message I get is "Time Machine couldn't back up to 'LaCie'". When I click on the details it tells me that an error occurred whilst creating the 'backup folder'. It has suggested that I verify and repair the disk, but I have done this to no avail.
I'm currently still running Mavericks on my Mac.
Is there a solution to this?