This is a 1TB drive.
After installing the software and the drive, I updated both the firmware and the WD SmartWare as suggested in the docs.
WD SmartWare does not appear to support scheduled backups of arbitrary folders, so I have opted to set up the standard Windows Backup utility to back up a folder on a specific partition of our server. However, after leaving it running through several scheduled backup times, there does not appear to be anything resembling a backup stored on the My Book Essential drive.
Then I remembered noticing that whenever I opened WD SmartWare, it always says the drive was locked and must be unlocked, which involves clicking an icon in the program. It seemed to require this every time I started the software, not staying unlocked between invocations.
How do I unlock the drive and keep it permanently unlocked, since this appears to be why Windows Backup hasn’t been able to write anything onto it?