May 28, 2010 · The Sata to USB board inside is OASIS DESKTOP 1607P, REV.B 4060-705078-001. The original drive inside the enclosure was a WDC WD20EARS-00MVWB0.
Are you talking the the large (3.5") Western Digital Elements External Hard Drive? The 3.5" drives can't be powered off the USB port (if that's what you are ...
Edit: Western Digital Elements External Hard Drive ... - GearHack
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Edit: docs / Western Digital Elements External Hard Drive Disassembly. Click ... Western Digital Elements External Hard Drive has a plain black enclosure.