You're copying a folder of photos to your Western Digital My Passport, and somewhere around 4 GB in, Windows Explorer stops. The progress bar freezes, then throws a dialog that just says "Operation Failed" with an OK button. When you look at This PC, the drive's gone. Not showing as needing a format, not with a yellow exclamation mark — completely absent from the list. Unplugging and replugging brings it back, but the same thing happens again after a few gigabytes.
What's actually happening here is the drive is dropping off the USB bus. Not Windows crashing, not the drive dying. The enclosure's USB bridge chip is resetting itself because it lost power. The My Passport series is a sandwich: a 2.5-inch laptop drive inside a small case with a USB-to-SATA bridge board. That bridge draws power from the USB port, and it has a low tolerance for voltage sag. When the port's power dips — because of a laptop on battery, a hub without its own supply, or aggressive USB power management — the bridge reboots. The drive vanishes and you get your "Operation Failed" message.
The reason this is so common with My Passport and less with, say, an SSD in an aftermarket enclosure, is that the WD bridge chip is picky about stability. It's not a flaw you can fix with software alone, but most of the time you can avoid triggering it.
What you need to do
1. Turn off USB power management in Windows
Windows has a hidden setting that drops power to USB devices when it thinks they're idle. Even during a bulk copy, the OS can misjudge and shut the port down. This is the number one cause on laptops.
- Open Control Panel > Hardware and Sound > Power Options.
- Click "Change plan settings" next to your active plan.
- Click "Change advanced power settings."
- Expand USB settings > USB selective suspend setting.
- Set to Disabled for both On battery and Plugged in.
This stops Windows from cutting power to the port. It's the single most effective fix for this exact error.
2. Check the cable and port
The cable that ships with My Passport drives is cheap. If you've bent it, twisted it, or stretched it across a desk, it can suffer internal breaks that make contact intermittent. Try a different USB cable — even one from another device if it has the same connector. Avoid extension cables entirely; they add resistance and voltage drop.
Also, plug directly into a port on the motherboard, not the front panel of a desktop tower. Front panel ports are often connected with thin internal wires that already drop voltage before the drive sees it. If you must use a hub, make it a powered one. An unpowered hub is asking for this problem.
3. Update the drive's firmware
Western Digital has released firmware updates for several My Passport models that improve USB bridge stability. To check yours:
- Download WD Dashboard from the WD support site.
- Install and open it.
- Go to the firmware section and let it scan.
- If an update is available, install it, then safely eject the drive and reconnect it.
Some people skip this because they figure it's just WD trying to push software. But a bridge chip firmware update can genuinely fix random disconnects. It's worth the ten minutes.
4. Change the drive's idle timeout
My Passport drives have a built-in power savings feature that spins down the disk after a few minutes of inactivity. During a long copy, if there's a lull — maybe you paused to read this — the drive spins down. When it tries to spin back up, the current spike can trip the bridge. You can disable this with WD Dashboard, under the power settings tab. Look for "Sleep timer" or "IntelliPark" and set it to never.
5. Reformat if the drive has been corrupted
If the drive dropped off a few times, the file system may now be in a weird state that causes errors even when the connection is stable. Right-click the drive in This PC, choose Format, and pick exFAT for compatibility with both Windows and Mac. If you don't need Mac compatibility, NTFS is fine. Formatting erases everything, so back up what you can first. If you can't read the drive at all, try a live Linux USB — sometimes Linux mounts drives Windows won't.
Still failing?
If you've disabled selective suspend, swapped the cable, updated firmware, and the drive still disappears during large transfers, check these:
- Is your laptop on battery? Some laptops reduce power to all USB ports when unplugged. Re-test while on AC power.
- Is the drive getting warm? Touch it after a failure. If it's hot, the controller may be overheating. Place it on a hard surface, not a blanket.
- Did you try a different computer? If the drive works fine on another machine, the issue is your USB controller. Update your chipset drivers from your motherboard or laptop manufacturer's site.
If the drive fails on multiple computers with different cables, the bridge board inside the case is likely toast. You can buy a cheap USB-to-SATA adapter and shuck the drive out of the enclosure. That bypasses the failed bridge. If the bare drive works, you've saved your data and your money. If it doesn't spin up even with an adapter, then the drive itself is dead — time to hit the recovery service or cry into a backup.
One last thing: My Passport drives are not known for lasting forever. The green-series drives inside have a higher failure rate than WD's Black series. If this is a recurring problem on multiple drives, consider moving to a different brand for future backup needs — I've had better luck with Seagate's portable drives, but your mileage may vary.