Time Machine Backup Failed 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?
I had an issue with backups not completing and I solved it by deleting the partially created backup folder.

First turn time machine off (System Preferences > Time Machine > Off)

Navigate to /Volumes/VOLUMENAME/Backups.backupdb/COMPUTERNAME/, where you will see a list of folders dated by when the backup was created. If you see a folder with .inProgress in the name, move it to the trash.

Turn time machine back on and complete a backup. If it fails again, I'd recommend taking a look at the resources here: http://pondini.org/TM/C10.html