memorex traveldrive etd250cs need reformat driver to reuse!?

May 14, 2012 at 10:33:06
Specs: Windows 7
USB connection diagnosed normal.
Suppose a blank storage (lost backup data..), cannot open or disconnect or reformat.

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May 15, 2012 at 03:32:31
That's usually a sign that the converter-board inside the external drive enclosure is faulty. The converter board converts the native interface to USB and this board is the most likely part to fail on external drives.

See if you can crack open the enclosure carefully and remove the drive. Then try connecting that drive by some other means to your PC (either connect it internally if you have a PC, or buy a third-party, empty enclosure for it.

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May 15, 2012 at 08:27:31
I'm assuming that you HAVE NOT dropped the external hard drive. If you HAVE NOT dropped it, or otherwise damaged it's connection at the drive, there's probably nothing wrong with the circuit board inside the external drive

Your problem is VERY COMMON.

The USB port you plug the external drive into MUST be able to actually supply 500 ma of current.
The external drive may NOT be detected correctly when it's plugged into a port in an external USB hub, or a port on the front of a desktop case.

It's very COMMON for people to DAMAGE the data on an external drive because they DID NOT do this....

If you have unplugged the external drive while Windows was running WITHOUT clicking on the Safely Remove Hardware icon and choosing to STOP accessing the drive BEFORE you unplugged it, you can damage data on the drive, and in that case, there may be NO drive letter for the drive that shows up in Computer or Windows Explorer, and in Disk Management the space on the drive will show up as being RAW or un-allocated, or unrecognized. . That can usually be recovered from if you use certain programs to repair the data damage, WITHOUT you losing all or most of the data that you know was on it previously.
However, DO NOT RUN CHKDSK on the drive !
(Type: diskmgmt.msc in the Start Search box, press Enter, to go to Disk Management. If the drive doesn't show up there, the drive is not being detected at all, for whatever reason. )

Troubleshooting USB device problems including for flash drives, external drives, external memory card readers.
See Response 1:

In addtion to that info....

For some desktop mboards you can have problems when an external hard drive is plugged into one of a pair of USB ports on the back of the case that are connected to the same USB controller, if there is another device plugged into the other USB port for the pair, because the pair can't actually supply 500 ma per port - they can only supply 500 ma in total. Usually those pairs of ports are one above the other, not beside each other. If you have two devices plugged into such a pair of ports, try plugging one of them in elsewhere on the back of the computer.

For MANY laptop and netbook mboards similar applies. The built in USB ports often cannot actually supply 500ma per port - they supply 500 ma in total for two ports that are close to each other. In that case, the external drive should work fine if it's the ony thing plugged into the USB ports built into the laptop or netbook, or if you have more than two ports, the only thing plugged into two ports close to each other.

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