You can get the latest update of this pack for free from us.
Asset Hunter PRO will find unused or duplicate assets in the project, and gives you the overview to easily delete them. You will also be given an overview over how your assets references each other.
Is this a tool for me?
Are you trying to go below a certain buildsize? Do you need to find out how assets references each other? Are all the old placeholder graphics and models cluttering up your project? Didn't you ever get around to delete the auto generated materials after model import? Do you have bunch of assets in your project, but is only using a small number of them? Does it seem like too large a task to remove obsolete assets?
If any of the above applies to you, Asset Hunter is the tool for you