Why is my WD external hard drive not detected by my computer?

What arrived at the lab

The WD external hard drive arrived at our Lincroft, New Jersey lab after being shipped in from New Jersey. The reported symptom was simple and serious: the computer did not detect the drive. We photographed and logged the device at intake, then opened it on the bench for a controlled first look instead of repeatedly trying it on customer hardware.

Bench work on the WD external hard drive

We performed the standard lab path for an external hard drive that was not detected. The enclosure, connector area, and drive electronics were visually inspected under the scope, then the drive was tested with proper data recovery equipment rather than a normal desktop connection. If there had been liquid exposure or contamination, cleaning would have been part of that controlled bench process before further power testing.

Drives that arrive like this usually fall into a few broad failure paths. The usual suspects are the USB bridge or port, power delivery, firmware access issues, degraded heads, media problems, or a mechanical condition that prevents stable detection. We treated the original drive as evidence, worked from the least invasive checks forward, and imaged recoverable data to a healthy drive so file recovery work did not depend on the failing hardware staying stable.

The recovery result

The outcome was data recovered. After imaging, we verified the recovered files and prepared the return copy for the customer. For mail-in cases, recovered data is returned on a healthy storage device, with the original media handled separately according to the customer's instructions.

If yours looks like this

If your WD external hard drive is not detected, stop trying different cables, docks, computers, or repair software once the symptom repeats. Keep the drive powered off and avoid opening the enclosure if the data matters. Our flat 100 diagnostic is applied toward the recovery, and the diagnostic answers everything before any decision.