Hi, My hard drive WD Elements (2TB) recently starts to work not stable. Without any reason, I had problems to move or copy some files from my HDD. Sometimes my computer doesn't recognize my HDD. I tried to use WD Data Lifeguard Diagnostic for Windows "Extended Test", but it failed because some errors. It doesn't even want to finish the test. It just hangs around ~15% of scanned sectors and completely stops. When I did "Quick Test", it passed.. I tried "HDDScan-3.3" and I've got S.M.A.R.T. report: Can someone tell me what is wrong with my external HDD and what I can do to fix it? Thanks for any suggestions.