WD External hard drive

[Wirezfree]

Yes, in a terminal:

Code:

sudo apt-get remove sg3-utils

That should remove it.
or
Open Synaptic Package Manager, search for the package you want to remove, sg3-utils
click on the checkbox next to it and select "mark for removal", click "Apply", the package should be removed.

Sometimes applications can also install multiple packages...
To make sure that you uninstall all related packages and configuration files,
You can type in a terminal:

Code:

sudo apt-get purge sg3-utils

or
Open Synaptic Package Manager, and "mark for complete removal" instead of just "mark for removal".