I'm not an expert at anything so these are just some random thoughts off the top of my head.
- Since you're using a netbook, are you plugged into ac or trying to backup on battery power alone?
- Have you tried a different USB port?
- With the GoFlex plugged in is it recognized in Disk Management?
- Does it have one large partition of about 931GB or does it have more than one partition?
- If more than one partition could you post screenshot of your maximized Disk Management?
How To Access Disk Management in Windows 7
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