Western Digital My Passport Drive. USB 3.0 Portable External Hard Drive.

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Why is my hdd work whit USB3 but dose'n work with USB2?

Hi

When I connect my "WD my passport" external hdd to usb2 port, it dos't work and show "USB Device not recognized" erorr . but in USB3 port, show thats Erorr but I can open it and see my File!!!

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Hi, USB3 ports can supply more power to a device than USB2 ports but it still seems as though there is a problem with the HDD. Try to determine if it is the PC or the HDD by trying it in another PC (both USB2 and USB3) and see what happens.

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That is very strange, however let's try to fix the problem.

Would you try to go to the manufacturer's website of the computer, look for Support/Drivers and enter your model number. After that look for a download(s) and download a "Chipset" or "USB" driver package, and install that. Reboot and see if the issue persists.

If it does, it may be a problem with the computer itself and you should contact the manufacturer if it is still under warranty.

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sajad eng will be eternally grateful.
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