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How to use a Western Digital “My Book” drive (Home Edition, but I don’t think that matters) in Windows 2003 Server:

1. Follow instructions for normal connection using USB, then:
2. Start -> My Computer -> (right-click) Manage Open Storage -> Disk Management  External drive will appear in list of partitions, but it will be inactive and will not have a drive letter assigned.
3. Right-click on the partition, select Mark Partition as Active
4. Right-click on the partition again,
5. select Change Drive Letter and Paths,
6. click Add.  Assign a drive letter.
7. The drive should now be accessible.

This procedure should only be necessary the first time the drive is plugged in.