Question about Seagate FreeAgent Pro 500GB External USB 2.0 and eSATA Hard Drive

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My seagate external hard disk in not detecting in my computer but the power light is blinking

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  • Seagate Master
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Test all leads that are attached to your external hard drive
good luck

Posted on Aug 30, 2010

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SOURCE: my seagate momentus 5400.2 external hard disk

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.


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.

Posted on Dec 12, 2010

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1 Answer

The blue light keeps flashing on and off on my Seagate 4Tb XHD. It won't show up on the finder as connected. What causes that?


follow these steps:
  1. Make sure the computer and external hard drive are powered on.
  2. Safely remove the drive from the computer (if possible).
  3. Disconnect the external drive's USB or FireWire cable.
  4. Disconnect the power supply plug from the external drive.
  5. Power off the computer.
  6. Disconnect the computer's power supply cord for 60 seconds.
  7. Reconnect the computer.
  8. Power on the computer.
  9. Connect the power supply to the external drive.
  10. Connect the drive's USB or FireWire cable and check for detection.
If that does not correct the behavior, and if the drive is also not detected by your computer, the blinking light is probably a symptom of a larger problem. If those steps do not return the drive to correct function, it is very possible, even probable, that the drive has failed and needs to be replaced

Dec 22, 2014 | Seagate Computers & Internet

1 Answer

My seagate freeagent 1tb is blinking whit lights and my computer does not recognize it. Help me


***Please NOTE***
Touch the drive and put your ear to it, to test if the drive is spinning and working. Do this while it is powered on. Also, try disconnecting the USB cable, reboot the computer, re-connect USB cable to another USB port on computer. If you still have the same issue, try the below solutions.
  • Make sure the computer and external hard drive are powered on.
  • Disconnect the external drive's USB or the eSATA cable, which ever one you're using.
  • Disconnect the power supply plug from the external drive.
  • Power off the computer.
  • Disconnect the computer's power supply cord for 60 seconds.
  • Reconnect the computer.
  • Power on the computer.
  • Connect the power supply to the external drive.
  • Connect the drive's USB or the eSATA cable and check for detection.
If the still no detection and still blinking lights on the drive, check the power supply to the drive.
Check to see what the led light on the power supply is doing.
If it's blinking, power down the drive, unplug data cable and then reconnect the power supply to another electrical outlet. If it still blinks repeatedly, then you power supply is bad.
If the led is solid (lit and not blinking) follow the same steps from above to connect it to another outlet.
Next, plug the power supply to the external drive and power it up.
If the power supply starts to blink repeatedly, then your controller board inside the enclosure is bad.

Thank you for the opportunity to help you.

Jun 04, 2011 | Seagate FreeAgent Pro 1TB External USB...

1 Answer

My seagate momentus 5400.2 external hard disk can't be detected by any computer. doesnt show up in the device manager, or anything. the light is on, for some reason, sometimes it blinks red/green,...


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.


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.

Dec 12, 2010 | Seagate MOMENTUS 5400.2 - HARD DRIVE -...

1 Answer

Seagate Portable 250 GB External Hard detected for only 2 secs


u can try some hit and trial...
1 - keep ur USB HD off and switch on the PC then switch on the power on USB HD
2 - try another USB port
3 - try another USB cable connector
4 - check ur Device manager/usb root hub settings/power setting, uncheck the box that says" alow computer to switch off power....in Power Mgt tab

Feb 18, 2010 | Seagate FreeAgent Pro - 500GB, 7200 RPM,...

1 Answer

I cant detect my USB external HD for more than a minute.


There is probably a fault within the hard drive, the circuitry of the housing or perhaps the usb lead.

It would be as well to check the power supply first as some of them are less than reliable and are apt to provide too much voltage.

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System will not detect my Seagate ST3500641CB-RK 500gb external hard disk


if your system some virus hope it is not read......better you try any other some card reader or pen driver if it read you try other OS ....

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