Question about Acomdata (HD320UFAPE5-72) (HD320UFAPE572) 320 GB Hard Drive

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Acomdata External Hard Drive blue light constantly blinking and not recognized by computer

I am having a problem with my external hard drive. I was in the middle of editing in lightroom last night and all of my pictures suddenly became missing and invalid. I look over and the blue light is flashing rapidly on the Acomdata Hard drive and then I go to explorer and it is no longer in my directory. I cannot get it in my directory no matter what I do. Please help me as I have several jobs that are on here that I need to access.

Posted by ftcphotograp on

  • 2 more comments 
  • ftcphotograp Aug 04, 2008

    I just paid for your F*(&^(*^% premium assistance and sat here with NOOOOO frigging response and now you tell me my time has expired and take my money!?!?! WTF!!!!!!! Off to dispute you hacks!

  • vikrammodi Nov 08, 2008

    The blue light blinks alternatively (blue / red ) what is wrong

  • Anonymous May 23, 2009

    Same - flashing blue light and drive no longer visible in "My Computer"

  • Anonymous Mar 18, 2014

    cannot access the hard drive in my computer



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How do I fix my external hard drive, because one day I turned it on and the drive was fine, the next day when I turned it on, it kept on flashing blue, does that mean that the drive is dead. Please help me with this.

Posted on Oct 30, 2008



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I had same problem of drive not being recognized with my 500gb version. Power supply tested OK but after checking power to drive itself there was no power. Something went on circuit board. The power plug for the HD was tight so being unable to get a standard plug in there I cut the leads and soldered a female plug to the leads, then powered it from my PC. Entered my password and drive mounted normally. Recovered all my files and scrapped the Acomdata enclosure. The drive is still working fine in my old XP PC after reformating it.

Posted on Aug 24, 2012


Mukesh Kumar

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Hi there,
Go into Control Panel/System/Device Manager and look for yellow exclamation marks. Delete any you find. Reboot your computer. Connect the external hard drive and turn it on. Let Windows discover it. If it asks for the driver, put in the CD that came with the drive.

Good Luck!!

Posted on Aug 24, 2009

  • NineReniN Mar 08, 2011

    I'm so disappointed! All these good reviews for this thing, and it doesn't work right. Let me say here that I tried it with my HP desktop and Dell laptop and get exactly the same results. Specifically:
    I hooked it up per the instructions, turned it on, and... nothing. The computer didn't even see it. So I unplugged the USB cable and when I plugged it back in, the computer saw it and it came up. Great! Turned it off, turned it back on... nothing.

    After MUCH experimentation I found that the drive must be powered on BEFORE being plugged in to the computer, which is not only contrary to the instructions, it's just stupid. It means you either have to let the drive spin constantly (stupid) or you have to disconnect the drive from the computer every time you turn it off (again, stupid).

    If you leave the drive spinning, you can connect and disconnect the USB cable all you want, it recognizes it every time.

    Makes no difference whether or not you properly unmount the drive before turning if off.

    All the good things people have said about the instructions and the ease of putting it together are true but it doesn't really matter because as far as I'm concerned, this is a deal-breaker. I've written to Acomdata and will wait for their response but unless they have a REALLY GOOD idea, this enclosure is going back.

    Update 6-16-10.
    Several reviews here have mentioned that the jumper had to be set to CS, not master as the instructions say. That was my problem. After I changed the jumper, it works perfectly.
    The Acomdata support people obviously don't know about this; they told me to send the drive back. Instead, I remembered about the jumper and tried it. It works great now. (I have told them about it, but don't look for them to re-print their instruction manuals.)

    Why am I leaving my rating at 1 star? If I hadn't found out about the jumper, I'd have sent the drive back ($$), probably gotten another one which, of course, wouldn't have worked either, then sent it back. (More $$) If my 1 star rating makes people look at this review, it can save some people a lot of trouble.

  • NineReniN Mar 08, 2011

    I found this comment on amazon...hope it works!


Sam L

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I have just encountered the red/blue flashing light on an external Acomdata drive. This appears to be a faulty POWER SUPPLY, because when I plugged in a compatible external power supply from another Acomdata drive the enclosure and drive functioned normally.

Posted on Aug 05, 2012

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