We are using Hyper V in a Windows Server 2008 R2 Enterprise environment, one of our guest OS we are using as a file server. We are always running low on disk space. It have a total of 500 GB of space and 498 GB is being used. We find ourselves always having to increase the disk space every week. Adding space is not the issue, however when analyzing the data there are many duplicate files, old files that haven't been accessed in years. Is there another type of fileserver that we should be using (such as features in Windows Server 2012 R2) that we enable us to provide better organization (possible something with deduplication)? We wouldn't be interested in using something like SharePoint.