Disk Read Error + Azureus + Finder is stucked

[kuzyaded]

Hello!
At the past month I get this error message ( in picture) , the external disk is WD 500GB disk. The finder became unresponsive and I need to do one of 2 things : or just to unplug the power cord from the disk and in this way force eject it or just force restart my iMac.
Someone have any ideas?

 

[BlueRevolution]

You could try a different BitTorrent client, but I suspect that the problem may be with the disk itself.

Have you tried verifying the disk in Disk Utility? Open /Applications/Utilities/Disk Utility.app, select the drive in the left-hand list, and click Verify Disk.

I also suggest ensuring that you have a backup of any important data on the external drive. This could be a sign that the disk is about to fail.