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  • #2262495

    Unable to recognize External USB Drive


    by twinkynz ·


    I have recently purchased an External Hard Drive. During a copy from my laptop to the external drive, I accidently unplugged the external USB drive.

    Now when I try to use my External USB drive, it is not recognized by my Laptop.
    I have tried re-installing drivers but to no avail.

    How do I format or fix this so I can continue to use my External USB drive.
    Any help appreciated.



All Answers

  • Author
    • #2518334


      by twinkynz ·

      In reply to Unable to recognize External USB Drive


    • #2518323
      Avatar photo

      Depends on what happens when you plug in the USB Drive

      by hal 9000 ·

      In reply to Unable to recognize External USB Drive

      If the computer recognises that you have a USB device present go into the Computer Management Drives and format the USB Drive.

      However if nothing at all comes up on the system when you plug in the device it’s likely to have been destroyed and is no longer usable.


      • #2522024

        Very Annoying

        by twinkynz ·

        In reply to Depends on what happens when you plug in the USB Drive

        The drive is only 1 day old.
        I went out and bought a 2.5″ > 3.5″ convertor today. The drive appeared and I formatted the drive.
        After installing it back into the USB enclosure, it still was not recognised.
        I then installed it back into my PC and formatted it as a Dynamic Disk.
        Now my PC crashes whenever the 2.5″ is plugged in and it still does not work with the external enclosure.

        Is this a common problem? Should I be using a different method for backup instead of a USB enslosure?



        • #2521917
          Avatar photo

          No this isn’t at all common

          by hal 9000 ·

          In reply to Very Annoying

          I’ve never seen something like this happen previously and if you look at the fuzzy picture here it shows what a 2.5 inch drive should look like at the connection

          All I can think of is that there is a jumper on the drive causing the problems as when you use a USB Caddy for a 2.5 inch drive you should never have a jumper fitted.

          But for backup this really depends on how important your data is and if you carry the HDD around as I’ve seen quite a few fail one business who I do work for was using this method daily to do generational backups and they destroyed every HDD because of a faulty USB Port and I had to take the most recent to a Data Recovery House and have the data recovered off the drive. Cost about 46K AU and that was because I have a deal with this particular company as the cost should have been much more.

          If you are not moving the 2.5 inch drive and always chose the Safely remove the USB device it will work fairly well but if you get any strange noises stop using the drive immediately as you could have a faulty USB Port that isn’t supplying enough power. In that particular case it not only destroyed the HDD’s but also the USB Enclosures so now they have a powered USB Hub to work from and only ever use that to plug into. Still not the best idea but it works for them. But they are also using a powered 3.5 Inch USB Enclosure and that is far more robust and far less likely to break, It’s also much cheaper for more storage space as well but it is much more bulky to work with so it gets placed into the safe and leads a very gentle life.


        • #2609187

          Did you re-partition as well?

          by 1bn0 ·

          In reply to Very Annoying

          If the drive is not damaged completely.

          I would try to re-partition the drive and then re-format again. If the format was corrupted I would expect the MBR etc. to be as well.

        • #2812879

          Dynamic Disk?

          by balge ·

          In reply to Very Annoying

          don’t think you should be using dynamic disks for this –

          I would try reformatting as a basic disk

      • #2812908

        What if the drive works on one computer

        by djblight ·

        In reply to Depends on what happens when you plug in the USB Drive

        My personal external hard drive, which is one of the maxtor one touch 4 portables, will work on my desktop running Windows 7 ultimate, but every other computer no matter what the operating system will not recognize the drive as being plugged in at all. There is power going to the drive as the light comes on and the drive spins, but no luck in recognizing the drive.

    • #2609238

      BIOS Setup

      by shkeat ·

      In reply to Unable to recognize External USB Drive

      Very likely your bios settings got changed. Got to your bios setup page and look for USB option. reenable it back and everything will be back to normal. Don’t have to format anything at all.

    • #2609181

      Did you try?

      by paul ·

      In reply to Unable to recognize External USB Drive

      Hi! Did you try to attach your ext hdd on other pc? If it’s works on other pc, that means your laptop encountered a low power on usb port. If it real then you don’t have choice to use your ext hdd on your laptop otherwise you can try to change another ext case

      • #2609135

        Water under the bridge

        by twinkynz ·

        In reply to Did you try?

        Thanks everyone.

        I installed the hard drive into a laptop and used a PE disk to boot.
        It is reconigsed but unable to format.
        So I gave up and forked out $100 for another 2.5″ drive.

        Problem resolved

    • #2769843

      try this

      by explorehalkidiki ·

      In reply to Unable to recognize External USB Drive

      are you sure you connected the usb no1 and not no2

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