WD Elements 1TB

Received new item today. Connected to laptop and started back up. After a long
while received “Did not complete successfully” and error code 0x8078012D.
Also " The request could not be performed because of an I/O device error".
I have no idea what this means.
On My Computer it says 753.97GB free of 931.48GB, but the individual files all show empty, so I don’t know if I have backed up puter or not.
Any explanation gratefully received.
VAIO laptop, W7 all up to date etc.

Hi GeorgeUTH,

Maybe you should try contacting WD’s Technical Support about this.

To Contact WD for Technical Support