Why won't my 3TB or 4TB external drive work with Microsoft Image Backup in Windows 7?


Microsoft Image Backup in Windows 7 will not support Seagate 3TB and 4TB drives (along with most other external drives above 2.1TB). This article explains.

Microsoft Image Backup in Windows 7 will not support Seagate 3TB and 4TB drives (along with most other external drives above 2.1TB).
Microsoft only supports drives that are set up to use 512 byte blocks as destinations for image backups. These drives are compatible with all other Windows functionalities.

To allow 3TB and 4TB drives to work in older operating systems like Windows XP, these drives are configured using 4K byte blocks.
Microsoft has added support for 4K drives in Windows 8. See here for more information.

For Backup Plus and GoFlex drives, the bundled software will allow you to backup your data.
For Expansion drives, consider using DiscWizard as an alternative to Microsoft's backup.

For more information about the limitations of Windows Backup and Restore, please contact Microsoft.





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