Sir, my wdbacy5000abk can't find in my computer and after I place the wdbacy5000abk in the usb port.. it will discovering infinite.. and the wd smartware is not working.. please help me what to do.. thanks..

What hapened to the drive before it stopped working, does it fell down? try to listen to drive very carefully, does it spinning ? are there any abnormal noises e.g click... or beeps ?

You can download Norton Utilities (30 day trial version) to test this hard drive and it is possible that this software can fix it. This is the download link:
http://download.cnet.com/Norton-Utilities/3000-18512_4-10907620.html

You can purchase another identical External Drive and swap the HDD inside it to recover your data or simply install the removed drive into a Desktop computer as a secondary drive to recover if the problem is actually the USB port.

oopppsss.. time for replacement

formatting will work fine.

click start control panel administrive tools ,computer management ,device manager look through all of your devices if you see a yellow question mark?or exclamation mark ! or red x
right click to reinstall drivers or
if you can see your usb but its not working
ports(com&lpt)right click update driver
if your computer came with a motherboard disk the drivers could be on it
sometimes the wires inside the cable will be damaged due to bending or stretching or placing heavy equipment upon the cable,
just replace the cable of the hard disk, when you plugged the external disk drive you got that windows could recognize the USB device change the cable everything should work fine again,
check the USB leads that attach to the motherboard usually red-white-green-black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems
hope this helps

there is NO problem on you external hard drive..the problem is in your own computer USB port..try to uninstall the driver of your usb port.then try it again.

I have looked myself and it does not appear that WD tell you what model number drive is installed in their External drive units. This is not a problem because the actual drive used is not the limiting factor.
Even USB 3.0 will be much slower than a directly connected drive.

If you really need to know, you could open the case and check up on the specs on the model you find inside.

You will possibly find, as in the case an external drive I have of another brand, that mounts a WD drive that it is a model that come out first about 2 years ago, and is now finding it's home in external cases.
Not that there is anything wrong with that. The very latest drives will be a bit faster use a bit less power, but be wasted in a USB enclosure.
That said, the two year old drive i mentioned has quite nice specs, and i would use it as a replacement drive in a laptop happily.

An external storage-device has four major components:

* the USB cable

* the power-adapter

* the disk-drive inside the enclosure

* the USB-to-disk-drive adapter inside the enclosure.

One of these components has failed.

Try a different USB cable.

Try connecting to a different USB port on your computer.

Try connecting to a USB port on a different computer.

Take a "multi-meter" and measure both the voltage and amperage output from the AC adapter, and compare with the specifications on the label on the adapter.

Open the enclosure, and remove the disk-drive, and then connect it as a "slave" disk-drive in a desktop computer, to see if it works at all.

Purchase a new, compatible, disk-drive, and install it in the enclosure, to "revive" your external storage device.

Get the part-number and serial-number from the label on your disk-drive, and access the manufacturer's web-site, and use "check warranty status", to see if they will replace the device, at minimal cost to you.

Note that W.D. has a "Customer Loyalty" program -- you can buy a new W.D. device, through the W.D. web-site, at a significant discount.

There exist commercial "data recovery" services that can try to repair your device, just long-enough to rescue and copy your files.
For example, see: https://services.seagate.com/index.aspx?lng=en-US for a "no data - no charge guarantee".

Several possibilities:

* bad USB port in your computer (try another USB port)
* messed-up copy of Windows (try connecting to a different computer)
* damaged USB cable between computer and the Passport (replace it)
* bad disk-drive inside the enclosure (replace it)
* bad USB-to-disk-drive adapter (buy a new "empty" enclosure)

Check the warranty on it, to see if W.D. will replace it, at minimal cost to you. If the warranty has expired, W.D. has a "Customer Loyalty" program -- buy a new Passport through their web-site, and you qualify for a discount on your purchase.