Time Machine - Unable to back up
I have recently changed my Time Machine drive to a larger Seagate USB 3.0 drive and followed the Apple directions to the letter in order to do this.
Since I have done this I keep getting the message at each scheduled back up that the back up has failed "Unable to complete back. An error occurred while creating the back up folder"
If I eject & physically disconnect the drive then connect again the first back up appears to work but then the error message comes back, the same happens if I shut the Mac down so I am getting a backup daily but only due to some manual intervention.
Any ideas please ?
Any assistance would be much appreciated.
iMac (24-inch Early 2009), Mac OS X (10.7.5)