Hi,
Thank you for posting on Microsoft Communities.
Some of the known causes could be associated applications, third party programs or services that are involved during the issue.
1) Is this issue specific to this party external USB HDD?
2) Did you check this with a different port?
In these scenarios, these are the steps we can try:
--Safe mode-to start Windows in a limited state where only essential programs are started:
Press and hold the shift key while clicking on Restart at
the login Screen (Bottom right corner) > Troubleshoot
> Advanced Options
> Startup Settings
> Restart >> Choose Enable Safe mode.
--Clean boot---to eliminate interferences from third party services and applications:
http://support.microsoft.com/kb/929135
Note: Please refer section:
How to reset the computer to start as usual after troubleshooting with clean boot of the Kb article to boot the computer in normal startup after fixing the issue.
--It’s good to check if the computer is clean by running a virus scan using Safety scanner:
http://www.microsoft.com/security/scanner/en-us/default.aspx
Note: Any data files that are infected may only be cleaned by deleting the file entirely, which means there is a potential for data loss.
I believe you must have tried these steps; if yes, did these steps make a difference to the scenario?
If you haven’t tried, you may try them and check if the issue gets resolved.
Also, you can disable the Autoplay options and see if it works: Type "autoplay" on the Start screen and click on
Autoplay settings. Move the slider to turn off the settings.
Link: http://windows.microsoft.com/en-us/windows-8/import-photos-videos
Do let us know about the results.