The device is not ready windows 7

[Dave_33]

Hello,
My external hard drive fails to backup files from c drive which contains all personal data files and all program software files with the above message, also giving the following codes
0x81000031 and 0-80070003

 

[database_89]

Hello,
My external hard drive fails to backup files from c drive which contains all personal data files and all program software files with the above message, also giving the following codes
0x81000031 and 0-80070003

I don't know if you will find these links useful for your problem [0x81000031 ] : http://social.technet.microsoft.com/Forums/en-US/w7itprogeneral/thread/b0909a78-6d01-4d59-ac5c-63d7b4bd72c0