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The error message is literally telling you exactly what's wrong: there was an input/output error on the device.
Windows 7 Home Premium running on an Acer Aspire Notebook. Following the instructions here in how to create a Windows 7 system backup and repair disc, after purchasing a Seagate Expansion External drive, 3 TB. It went OK up to Windows saving the backup, "Preparing to create the backup". Then the following wording appeared: "One of the backup files could not be created," with an error number. Additional information: "The request could not be performed because of an I/O device error," with another error number.
In this excerpt from Answercast #61, I look at a new external drive that is showing an input/output error.
In this kind of a situation, my tendency is to believe the error message.
The error message is literally telling you exactly what's wrong. There was an I/O (an Input Output) error on a device. Since it says the file could not be created, my assumption is the I/O error happened on your external drive; the drive that the backup was being written to.
Now, exactly what happens next really varies.
One thing I would do is I would run ChkDsk /R on that external drive. So if the drive is Drive letter F: for example, then in a command prompt, run "chkdsk /r f:" and then hit the Enter key.
ChkDsk will actually check the surface of that drive to see if there are problems on it, and potentially, it will mark bad sectors on that drive as being bad.
If that doesn't resolve the problem, I'd be seriously tempted to return that external drive for warranty work. It shouldn't have any problems when you get it out of the box like that and this definitely does feel like a problem on that external drive.
So, those are the things that I would do, the directions I would heed. The
error message is actually telling you the truth in my opinion. It is telling
exactly what's wrong. The trick is understanding that what it means is there's
a problem with that external drive.
Next from Answercast 61 - Does having my video card on the motherboard mean I can never upgrade?
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