I am not sure if this was suggested before, so sorry if it was.
The S+ Dedicated Storage "Set Rescource" List is incomplete. Many Items and Recources can not be added to the S+ version.
As mentioned in this Google Docs (Instructions) it is possible to add more Items by edditing the GameUserSettings.ini. I am not sure, but i think at an Online Server this has to be done at the Server Config.
It would be nice to have all the Rescources available to be stored in the S+ Dedicated Storages.