How many times have you accidentally deleted something you shouldn't have? It happens to us all. In those situations knowing that you have a backup is a welcome feeling indeed. OUCS operates a University-wide backup service for University staff members and postgraduates via the Hierarchical File Store (HFS) that is suitable for personal computers and servers alike. And the HFS doesn't just provide a backup service, it also provides an archive service for the long-term storage of data. The archive service is invaluable to projects who need to store data that is of long term value to the University; such projects should look at the University's Policy on Computer Archiving Services.