Hi,
When I want to copy files to my external hard drive every times it fail and the hdd is no longer usable until I unplug it and replug it. So I made a test with WD Smartware for smart test and complete test and both failed. Is there a way to know what the problem is and if there have any solution. Thank you.
You can try testing with our own Data Lifeguard Diagnostics and verifying with the error information in our knowledge base article.
How to test a drive for problems using Data Lifeguard Diagnostics for Windows
http://wdc.custhelp.com/app/answers/detail/a_id/940
Data Lifeguard Diagnostics Error Codes
http://wdc.custhelp.com/app/answers/detail/a_id/654