So i have this issue with a Seagate Expansion 3TB.They started off saying: "Seagate does not support using our 3 or 4TB drives in a 512 byte sector size, as the physical sector size is 4k, and attempting to emulate 512 for a drive this large
causes degradation of the drive. Other manufacturers may be willing to damage their drives to do this, Seagate is not willing to do so. Our 2TB and lower are capable of doing this(and are actually set that way from the factory), but the 3 and 4TB drives rapidly
degrade when attempting to use in the fashion you describe. To achieve 3 or 4TB on a drive it must use the 4k sector size. For this reason, 3 and 4TB drives are not supported by Windows 7 backup at all." and followed that up with: "I
am sorry that you are having this problem with your drive. Your drive is compatible with windows 7 because you can store information on the drive via copy and paste. However a 3 TB or larger hard drive like yours use a sector size of 4 KB which is currently
unsupported by Windows 7 Image Backup. I believe there is an update however for windows 7. Windows has been working to get their windows 7 image backup up to date. Please use the link below for more information from Microsoft on this issue.
Please see the following link:
http://support.microsoft.com/
You may download and use our Seagate DiscWizard software to manually create a disk image backup without this limitation. See more information at this Knowledge Base article:
http://knowledge.seagate.com/
Here is a helpful article on how to create an image backup using Seagate DiscWizard:
http://knowledge.seagate.com/
For additional assistance, feel free to contact us at: www.seagate.com/about/contact- "
Hope this helps someone. Didn't Help Me.