Well we use a tool that comes with our product called a Lan Discovery, it wil tell you when the last time a fiel has been accessed, how big it is, how many duplicates on the network and across the enterprise not just on one machine or server, even the amount of data change ratio that happens on a daily basis. If you would like more information please email at
steven.ferman@etegrity.com and I will send you an information sheet. This tool is invaluable in our day to day cleint management of thier data and more importantly in the management of thier RTO (Recovery Time Objective) you know what matters the Recovery not the Backup.
Steve