WD My Book issue

sambat2000

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Feb 14, 2011
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Hi, I have a 3TB WD My Book which I removed the drive from for a project. As I had a 1TB Seagate drive doing nothing I decided to put it in the My Book case. I know the disk is fine as it was new, tested, formatted etc - however my Win 10 pc cannot see the drive inside the My Book.
Disk Management sees the disk as "Unknown" and "Not Initiatised". When I try to initialise the drive it reports "Request failed due to fatal device error"
I know both the My Book worked with the WD 3TB disk inside, and the 1TB Seagate disk is fine.
Any ideas please?