Hi D7D7,

Windows 8 should install the USB 3.0 drivers by default from the Chipset drivers as a separate driver  is not available. You can try installing the Windows 7 driver in Compatibility Mode and check if the ports work properly. You can download the drivers from the following link:
http://dell.to/RJc1H6

Follow the steps provide below to install the drivers in Compatibility Mode in Windows 8:

1. Right-click the Setup icon and choose "Properties."
2. When the "Properties" dialog box appears, click the "Compatibility" tab and then click the "Run Compatibility Troubleshooter" button.
3. In the "Compatibility Mode" section, select the "Run This Program in Compatibility Mode For" check box and select the program's desired Windows version from the drop-down list.
4. Click "OK" and then run the file again.

Please let me know if you need further assistance.

http://img443.imageshack.us/img443/7743/84204837.png

same massage unfortunately :(

What Chipset should install USB 3.0 driver ? because its 3 in the chipset driver section for windows 8 here in the site.

Hi D7D7,

Thank you for your reply and for providing an update on the status. It is the second driver in the Chipset list. You can download the drivers directly from the following link:
http://dell.to/PXPnfp

Please let me know if you need further assistance.

I did install it and I restarted my computer. Then i plugged my USB 3.0 HDD but it didn't showed in the my computer.

is there a way to reach the HDD on my comuter ? even if it convert the hdd to USB 2.0 or something.

appreciate your help ..

Hi D7D7,

Thank you for your reply. Please right click on “Computer” and then link on “Manage”. Please check if the hard drive is detected in the Drive Management and let me know about your findings.

Hi,

 Sorry for late and thank you for your patient .

anyway I did plugged the USB 3.0 hdd then I checked disk management but it never appeared :(

Hi D7D7,

Thank you for your reply and for providing an update on the status. I suggest you to update the BIOS and check if the hard drive is detected properly. You can download the BIOS from the following link:
http://dell.to/ZodNT6

This issue can also occur if the USB 3.0 cable is damaged internally. You may also check with a known good USB 3.0 cable. Please let me know if you need further assistance.

I installed it and nothing changes !

Hi D7D7!

I have almost the same problem with my 5520 R15. Have you found any solution for this annoying situation?

Thank you,

Gábor

Unfortunately no