Fix Seagate External Hard Drive Light Blinking but Not Working/Detecting Error

This page's solutions are divided into two parts: the Seagate external hard drive light is blinking but not working/detecting and the light is not blinking. Directly jump to the part according to your own situation to get fixes:

Workable Solutions	Step-by-step Troubleshooting
Part 1. Hard drive light is blinking but not working/detecting	Fix 1. Change USB Port...Full steps Fix 2.Turn On USB Root Hub...Full steps Fix 3. Clean Up Virus...Full steps Fix 4. Show All Hidden Devices...Full steps Fix 5. Update Hard Drive Driver...Full steps Fix 6. Change the Registry...Full steps
Part 2. Light is not blinking	Fix 1. Check the Power Supply...Full steps Fix 2. Take the External Hard Drive Out...Full steps Fix 3. Ask for a Replacement...Full steps Fix 4. Get Manual Data Recovery Service...Full steps

Part 1. Seagate External Hard Drive Light Blinking But Not Working

It's no longer a new case that storage devices such as USB drive or external hard drive suddenly become undetectable by PC due to unknown reasons. Seagate external hard drive light is blinking but not working or detecting on PC is one of the problems, which is still a troublesome case for many users. The issue of "Seagate external hard drive light blinking but not detecting" may result from the problems on the hard drive itself or from other non-device errors. To help you fix the matter, we will present you with six effective methods to repair and fix Seagate external hard drive not working error.

Seagate External Hard Drive

Never mind trying the three quick fixes first since minor issues can also result in a problematic external hard drive.

Fix 1. Change USB Port and Reboot PC

Quite often, the Seagate external hard disk light blinking but not being detected issue can be easily fixed by simply changing the USB port and rebooting the computer. To do this, disconnect your external hard drive from the computer. Now turn off the PC for at least 1 minute. Then reconnect the external hard drive via another USB port and turn on the computer. You can also connect the device to another computer if possible to have a try.

Fix 2. Turn On USB Root Hub

Connect your Seagate external hard drive to your PC and then start the following process:

Step 1. Click "Start" and type devmgmt.msc.

Step 2. Open "Device Manager" and expand "Universal Serial Bus controllers".

Step 3. Right-click "USB Root Hub", click "Properties", and then select "Power Management".

Step 4. Uncheck "Allow the computer to turn off this device to save power".

Seagate External Hard Drive Light Blinking but not working - Turn on USB root hub

Step 5. Repeat this process for each USB Root Hub in the list and reboot PC.

After this, you should be able to see if Seagate external hard drive is detected by your PC then.

Fix 3. Clean Up Virus

If your computer or Seagate external hard drive is infected by a virus, it may cause the drive not detectable or unreadable. In this case, the best solution for this issue is to use virus cleaning software to wipe out and clean up the virus on your drive and PC. Then you can reboot PC and retry to access the Seagate external hard drive.

If these simple tips fail to help you solve the issue "Seagate external hard drive light blinking but not working", don't get frustrated. There are three more advanced solutions for you to apply.

Fix 4. Make Seagate External Hard Drive Show Up in PC by Showing All Hidden Devices

Step 1. Click on "Start", type devmgmt.msc, and select "Device Manager".

Step 2. Click "View" in the menu bar, then select "Show hidden devices".

Fix external hard drive not working but light on - show hidden devices

Step 3. Expand all notes by clicking on the "+" icon.

Step 4. If there are any greyed entries, right-click on it and select "Uninstall".

Step 5. Reboot your computer and try again.

Fix 5. Update Hard Drive Driver to Fix Seagate External Hard Drive Not Detecting Error

Step 1. Click on "Start" and type devmgmt.msc to open "Device Manager".

Step 2. Expand "Disk drives", right-click your Seagate external hard drive and select "Undate driver".

Fix Seagate external hard drive blinking but not working - update drivers

Step 3. Then check out whether any device shows up as unrecognized or not.

If the Seagate external hard drive shows unrecognized, go to the drivers' tab and delete/uninstall the driver
Then check out whether the external hard drive shows up in "My Computer/This PC" or not
If it doesn't show up, reboot or restart the PC
If it shows up but disappears later, repeat the above steps and go to Disk Management, change the drive letter of your Seagate external hard drive and reconnect it to PC to let the PC detect it again

Fix 6. Delete Registry Key to Make Seagate External Hard Drive Detected and Work

Note that any false operation using Registry Editor may result in serious problems. You should be highly careful while following the steps here to delete a Registry key so to make the Seagate external hard drive detected and work again.

Step 1. Click on "Start", type regedt32 and click "regedt32" to run "Registry Editor".

Step 2. Back up your registry by going to "File" and clicking "Export". Save the registry keys on your computer.

Step 3. Go to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E967-E325-11CE-BFC1-08002BE10318};

Step 4. If you see any "UpperFilter" or "LowerFilters" on the right side, right-click to delete it.

Fix Seagate external hard drive blinking but not detecting - change registry

Step 5. Then close the registry, reboot the PC, and retry to open your external hard drive again.

Part 2. Seagate External Hard Drive Light Not Blinking

If your Seagate external hard drive is not working nor detecting and the light is not blinking, it may be caused by power supply issues or failed HDD. Here are four methods to deal with a Seagate external hard drive that is not blinking:

Method 1. Check the Power Supply

If there is a power supply issue, your external hard drive won't blink at all when you connect it to your computer. To check the power supply, you can:

Step 1. Change the USB cable.

Step 2. Change the USB port.

Step 3. Connect your external hard drive to another computer if possible.

Method 2. Take the External Hard Drive Out of Its Enclosure Case

The external hard drive you are using actually contains your external hard drive itself and its enclosure. To exclude the issues caused by the enclosure, take your external hard drive out of the disk enclosure and connect your HDD to your computer directly.

If the Seagate external hard drive still won't power up, try one of the two methods below.

Method 3. Ask for a Replacement

If the two tips above don't work, it's highly likely that your hard drive is dead. In this case, if your Seagate external hard drive is still under warranty, go to get a replacement from where you have bought it.

Method 4. Get Manual Data Recovery Service

If your HDD is dead and out of warranty, the best way to recover your precious data on the device is to ask for manual data recovery services. Any existing data recovery software cannot restore files from an external hard drive that has crashed or damaged since it can't be detected by the computer, not to mention perform data recovery on it. (You may be interested in hard drive recovery cost in 2020.)

Part 3. Restore Data from Seagate External Hard Drive

After fixing the Seagate external hard drive not working or not detecting issue, you may now try to open Seagate external hard drive to check your precious data.

If nothing is found or there is data loss on your hard drive, don't worry. Powerful hard drive recovery software - Deep Data Recovery will help you get lost data back. As long as your external hard drive can be detected by your computer and the data is not overwritten by new content, it will retrieve all lost data for you.

Qiling data recovery software enables you to:

Recover data from emptied Recycle Bin, formatted hard drive, corrupted or damaged storage drive, etc.
Restore lost or deleted files from HDD, SSD, USB, pen drive, SD card, external hard drive, and more
Repair corrupted files automatically during data recovery on Windows 11/10/8/7

Free Download
Windows 11/10/8/7, 100% Secure

Follow to recover data from your external hard drive with a few simple clicks:

Step 1. Use a correct USB cable to connect your external hard drive to your computer. Run Deep Data Recovery on your computer. Select file types and click "Next" to start.

Select file types that you want to recover

Step 2. In the next window, you will see your external disk under External drives. This software supports all the popular external disk brands, including WD, Seagate, Toshiba, LaCie, SanDisk, Samsung, etc.

Select the external hard drive and then click the "Scan" button.

select your seagate external hard drive and click scan

Step 3. As soon as the scan process starts, the software will find more and more lost and deleted data and display the data in the scan results. The recovered data will be nicely organized. You can quickly find the target files/folders by file type or search in the search box with exact file name.

scan the lost data on the seagate external hard drive

Step 4. You can preview the files found by Deep Data Recovery's scanning algorithms. Then, select files and click "Recover". To avoid data overwriting, we recommend that you save the recovered data to a different drive than the original Seagate drive.

Part 4. Back Up Seagate External Hard Drive

Besides getting a powerful data recovery tool like Deep Data Recovery, it's necessary to back up your devices or files to reduce the risk of losing data on Seagate external hard drive and other devices.

To make a backup of your precious data, you can use free backup software - Qiling Backup. It supports the backup of your computer hard drives, external hard drives, USB, memory card, and other conventional storage devices. Whether you want to back up your device or selectively back up the files on it, you can get things done with the software.

Step 1. For the first time you use Qiling Backup to back up files, click File backup on the Backup and recovery page.

Step 2. Follow the paths to locate the files, folders or directories you want to back up, select them all.

Step 3. Now you need to select a backup location to save and retain the backup.

Step 4. Qiling Backup allows users to save the backup files to every device that is handy for you, like a local hard drive, external USB drive, SD card, network drive, or a NAS drive, plus a cloud drive of the Qiling brand. We personally recommend users to choose the cloud drive prior to a physical drive to save important backups due to the greater accessibility, flexibility and safety.

Step 5. If you're interested in an automatic and intelligent backup schedule for the next file backup task, go on with the "Options" setting. There you can encrypt a confidential file backup, compress the backup image size, or customize a backup scheme to tell the software in what time to start the next backup.

Customize an advanced and automatic backup task here:

Step 6. Click "Proceed" to start the file backup process. Your completed backup files are visible on the left area in a card style.

As long as you have a backup available, you will feel less annoyed and more relieved the next time you come across an issue like "Seagate external hard drive light blinking but not working". Don't hesitate to give it a try.

Conclusion

This page covers 10 fixes to help people get rid of the Seagate external hard drive is not working/detecting issues with its light blinking or not.

As for the Seagate external hard drive light blinking but not detecting, users can refer to Part 1 and pick up any method for help.
As for the Seagate external hard drive is neither working nor blinking, revert to Part 2 with provided fixes for help.
As for data loss and data protection on storage devices, Qiling file data recovery software and backup software are always ready to help.

You can also apply the fixes to Toshiba, SanDisk, or Samsung external hard drive that has the same error of "external hard drive not working/detecting but light on" or "external hard drive not working and light not blinking".