Backing up resources in Warewolf does not happen by default.
Each resource is digitally signed by the server it is on and will not load on another server, unless it has been deployed there from within Warewolf.
To restore your backup, put the backed up files back into the resources folder of the same server they were backed up from.
To back up these resources, you will need to back up the following location:
%programfiles(x86)%\Warewolf\Server\Resources
To build a backup Service in Warewolf is simple and an example can be found here.